The CD-R and DVD+R you have are both very good. No one knows how long they will all truly last but the stability of those two media are said to be very good.
I would not worry about the DVD+R not lasting, it should last a very long time. Verbatim have always been good quality discs.
I recently purchased some of thesse: http://www.pcx.com.au/products/detail.asp?&item=907 I have not received them yet but they are scratch proof. They generally are much much harder to scratch. Unlike with other dvd media where you can simply wipe on your shirt and make multiple tiny scratches, this media is immune to that.
I have tried some TDK scratch proof discs and also imation (fujifilm03) and they are both quite resistant. Add to the fact that these Verbatim 8x -R are said to be one of the most compatible discs around, it's hard to go wrong with them. Long term stability is also said to be quite solid.
So perhaps you should consider using scratch proof DVDs for both your office files and photos, since both are probably important to you and should be protected.
Just so you know, DVD is way stronger than CD-R when it comes to getting wrecked. CD-Rs can have their data layer wiped right off if something sharp hits the label side of the disc. DVDs data layer is stored between two layers of plastic, making it almost impossible to wreck the data layer.