Searching around you can come up with a lot of 64 bit dirvers.
As far as I know all the motherboards come with 64 bit drivers for XP64 as far as the onboard devices go anyway.
Both ATI (beta) and nVidia have XP64 drivers.
Creative have 64 bit drivers, you just have to go searching to find them.
Only thing I didn't find drivers for was my Mylex 170 SCSI RAID card, but someone is in the process of doing them

.
Use a dual boot, get the best of both.
Now that Intel have joined the bandwagon I expect things to progress a lot faster now, after all wasn't that the real reason XP64 final release was 'delayed'.