@ borat007... well those Verbatim 16x discs will burn fine @ 8x with quality on damn near all drives. assuming you can change the burn speed to 8x on your recorder. (my old Liteon 1673s (from 2005) burned to Verbatim 16x certified media perfectly fine @ 8x)
with more modern ones (i.e. Sony 7240s) you can burn @ 20x with quality results where as my older burner 8x seemed to be the sweet spot and raising burn speed seems to effect burn quality according to the disc quality scans.
but if you want to play it safe... 8x is usually a safe bet no matter what drive you got (assuming the drive is nothing ancient and a half way decent brand (i.e. if the drive is rated to burn @ 16x (or so) odds are it's not ancient))
i ain't looked into the details on your standalone recorder device but i figure even if the quality is not 'top spec' when burning @ 16x to your Verbatim 16x media it should still offer decent burn results i would think especially if the Verbatim's don't degrade to much over the years which it looks like they hold up well over a few years as most people say. because say i burned a random Verbatim 16x disc today and ran a disc quality check on it and then waited 3+ years and re-scanned that disc for quality, it would most likely be pretty much the same as when you first burned it.
so from the looks of things it appears Verbatim media in general lasts a long time. say roughly 5-10+ years. no one really knows how long discs can last as CD burning never really got affordable til roughly 1998-1999+ range (DVD Burning i would say got affordable in the 2004-2005ish range). but it seems even being conservative that Verbatim media with good initial burn quality is likely to make it at least 5+ years to where you can copy the data from the disc back to the PC and have it in good running order.
p.s. i actually have some CD-R Verbatim 2x media that i got and burned in the 1999 range (on some crappy Memorex 2x burner lol (i don't remember exact model)) that i believe still work.
in fact, i just copied the data from it back to the PC and it seems to read the disc at full speed without any drive motor slow downs that you can usually hear when the drive has issues reading the data burned to it.
so if those old Verbatim CD-R 2x rated discs i got are any general indication of Verbatim's overall quality.... then it's a safe bet the DVD's burned nowadays on a quality burner with good initial burn quality will most likely last 5-10+ years in my estimation
-------------------------------- starting to drift a little off topic below but still is something to consider, at least eventually ------------------
and 10 years is quite a long time in technology because in 10 years time we might not even be using CD's or DVD's much any more as hard drives in general are getting cheaper and cheaper to the point they are approaching the cheapness of recordable DVD's (they might already be overall cheaper besides up front initial costs. as i would have to calculate ) and are much faster/easier to use to get quick access to your data so in some ways hard drives might already be better choice.
in fact... i just calculated the cost of roughly 2TB from a hard drive which is about $140 on newegg at the moment and to get that same storage from Verbatim 4.7GB media, you pretty much need over 4 100pack spindles of recordable 4.7GB DVD's (which is still only 1880GB for 4 100packs)... but we will just call it 4-5 for now which even if you got those @ 20 bucks each (which is typically the best price you can find Verbatim 100 packs for) that comes out to about 80-100 dollars for 4-5 100packs of Verbatim media and a 2TB hard drive costs $140 (so strictly $$$ cost the hard drive is not to much more (about $40-60 more than the recordable media))............... so as you can see a Hard Drive, at least in some ways, is actually better/all around cheaper than using recordable media....... then you got to factor in 'time saved' on using a hard drive vs swapping through countless discs which is probably worth a lot right there especially if your always busy and free time minimal in general.
but i guess using a hard drive even though it might be overall cheaper can be a issue as up front cost could be a issue. plus accidental erasure of important data could happen and potential failure of the drive could happen because moving parts seems more risky vs quality media which has no moving parts where the data is itself. so each has there up's and downs but if you can handle the up front costs it might be easier/quicker to retrieve data from a hard drive and if you had 2 2TB hard drives so you can have 1 copy of important data on 1 and 1 copy on the other odds of losing that data would seem slim.