i have pioneer dvr-104 which is just the bare drive of the A04 and it rocks.
buffer underrun protection for dvd-r/rw and cd-r/rw
and writes 2x for dvd-r and rw
it copies dvd rom ps2 games without any problems
if you want the dvr-104 and you live in UK goto the following site for a great price at only £299.99 inc VAT
which is really good.
also includes 14 free discs
http://www.bigpockets.co.uk
SQWADDY