Bob11879 and G@M3FR3@K, thanks for your answers!
I can see reading your posts that it is not an easy choice!
Originally posted by bob11879
Remember, you have a 1 yr warranty.
Well, actually 2 years here in Europe...
However, I experience the "BP problem" only with Plextools, I tried to burn with the 708 using Nero and CloneCD and I had no problem.
UPDATE: I tried to UNCHECK "Use buffer underrun" in Plextools, to see if the burning process would stop at some time, but it finished correctly, including lead-out (still with BP=256, of course)!
My idea is that the problem is at software level... I must admit that I have a lot of burning software installed, a lot of devices (also SCSI and USB2), virtual drives, and therefore the possibility of some kind of conflict is not irrelevant...
I am planning to upgrade my system from Windows 2000 to Windows XP, and to do some tests using VMWare, so for the moment I'll keep my 708 (which is able to burn my Princo-DVD-R 4x crap quite well...) and see what it happens.
It is important for me to hear opinions from people more experienced than me, so thanks again.