Crucial RAM has a good rep out there, AFAIK. Your motherboard sounds like a good 'ole BX-based board. The BX/LX chipset's excellent and stable. You should be in fine shape in this regard.
Might as well get PC133, it typically doesn't cost any more than PC100 (it's the same stuff, just tested out and rated at a 1/3 higher cycle time). In fact, it can be hard to find PC100 at times, at least at Fry's (just had to mention Fry's to bring fond tears to Mike's eyes! Poor Mike doesn't have anything like it in New Hampshire)
