Quick Computer Question

[sc1103]

Since I'm on a budget and need a new CPU/Mobo comonation, I found 2 nice barebones kits that fit my needs, both of which are from Tiger Direct (goin in w/ a couple of my firends to save shipping $$$).  The first has a Sempron 3000+ (2 Ghz, 512 MB cache, 333 MHz Bus Speed).  This one is $20 cheaper than the second, which has an XP 2900+ (2.08 Ghz, 512 MB Cache, 400 MHZ Bus Speed).  Im not sure if the second would be any more useful in MAME/other emulators than the Sempron, and money IS an issue.  Its only $20 but as a high school student on a really tight budget I can't afford to spend too much on this project w/ college around the corner (praying for some merit aid).  So which should I go with?

Thanks for any help 

[Dire Radiant]

If it's exclusively for MAME then I'd go with the cheaper one. If you want to do other things with it then that 400MHz bus speed will come in handy.

[RayB]

Both of them are over-kill for MAME.

[sc1103]

Both of them are over-kill for MAME.

Yeah but I would like them to handle my PSX and DC Games, so thats why Im in this position...otherwise Id go w/ a 500 MHz PC