There is a world of difference between a real true Plextor PX-760A and a Re-Badged PX-800A. The PX-760A is far superior to a PX-800A. Newer does not always mean better. The PX-800A is not manufactured by Plextor but is actually a Re-Badge NEC/Optiarc (AD-7173).
Plextor usually has some refurbished Plextor PX-760Aâ€™s available and in my book a refurbished Plextor PX-760A is far superior to any PX-800A. I would see if you can get a refurbished Plextor PX-760A instead of PX-800A Re-Badged NEC/Optiarc (AD-7173).