I built a box for my boss with that board, and a PIII 733, and a 3dprophet 2 gts, and it is a sweet setup, it has never given him any trouble, although he is not a clocker...but the board IS running at 133mhz, because of the default speed of the 733, and it has proven to be a stable system, he also has a Richo dvd/cdrw combo, and a pair of Maxtor ata100 30g, and a pioneer true 52x cd, and aHollywood dvd card,in a Inwin Q500. All this is running win2k NTFS.
I built the system when the BX133 RAID first came out, and it still is a joy to run, according to my boss...dvd playback is smooth as silk.
If bx performance is what you want, there's none more up to the job, although they can be tricky to setup, but the manual is well writen, and easy to understand.
Personaly I like the 815e chipset,like the SE6, as it has more options to play with.
Good Luck on your choice