My personal experience with the 2.4x RiData +R media is that they burn beautifully at 4x (hacked fw, of course) with various 812S and 832S firmwares (didn’t really detect a difference in the end result between different firmwares). When bumped up to 6x or 8x, about half of them coastered (and the other half turned out quite nicely… but then again, this is 2.4x-rated media … I guess this just shows how much media variation there is just within one 50-pack of discs). Of course, with Ritek’s recent fall in quality and the increased variation in their end-product, your results may vary quite a bit from what I got. If I were you, I’d probably get 6x or 8x a try just to see, but won’t get my hopes up. 4x will probably work nicely.
As for the 4x RiData media, I have no experience with them. I know that in the past, they have been RICOHJPNR01, which is pretty good, but my understanding is that Ritek has switched these discs to RITEKR02 or RITEKR03 (yes, I know, R03 is technically 8x, but Ritek’s been packaging them into some of their 4x packages for some reason). Based on what I’ve seen, RITEKR02 and RITEKR03 performance is really a shot in the dark, as I’ve seen lots of variation. Some have been able to get beautiful 8x burns out of them, while some struggle with them at 4x.
As you can tell, I have very little love for Ritek. It’s no secret that in order to maintain profits, they’ve been slashing back on quality control recently, so you’re always taking a bit of a gamble with them. That having been said, they aren’t too bad, and at the very least, they should burn okay at their certified speeds.
BTW, the +R discs sold under the Fuji name are RICOHJPNR01 or R02 (depending on what speeds you get). Although Ricoh discs are made by Ritek, it seems that Ritek doesn’t jack around with the Ricoh discs as much as they do with Ritek discs. So you might have better luck with the discs found in Newegg’s Fuji media section.