Go with the athlon, definitely. For a start, it'll faster than the P4 under most circumstances ( i hear a 1.3GHz athlon is about comparable to a 1.7GHz pentium 4. )
Also, the RDRam that the P4 needs is eggregiously expensive (just looking at a stockists web page now, £411 for a 256mb stick of RDram vs £48 for 256mb PC133? Think i'll pass) while not providing that much more performance in real-world tasks over SDRam.
The athlon system also has a bigger hard disk and more ram. I'd definitely go for system b.
This message has been edited by DuSTman on June 22, 2001 at 06:27 PM