Let me give you a little advice.
If you're just a casual computer user for games/web browsing/word documents etc, it really doesn't matter whether you buy a P4 or an Athlon. Both will give you acceptable performance for what you need. That being said, the Athlon system will indubitably be cheaper and just as stable as the P4 system.
If you have other areas such as video editing, serious 3d work, and intensive multimedia applications to look at, then it becomes a different story and you really should take a look at the benchmarks you're interested in.
You should also take whatever benchmarks you DO find with a grain of salt - rarely will you find effective or totally impartial benchmarks. AMD and Intel sympathizers are more than happy to rig up benchmarks on a website that favor their platform of choice. Some are easy to spot, some aren't.
I am a completely neutral user... I own numerous Intel based systems, but only 2 AMD systems. Right now I'm using my overclocked Duron system, which has proven to be a fast and stable performer and was purchased in parts at a very low price. Back when I bought the Duron processor itself, the 800 cost me something like 50 bucks. Overclocked to 1G, it far outperforms my PIII 833. That PIII was expensive too
Now isn't exactly the best time to buy a computer system. There are far too many great products just around the corner to use the argument that "whatever I buy now will be obsolete in a week anyway". If you do buy a system right now, I think it's pretty obvious that AMD gives the best performance for the price. The current P4 is a crippled version of the 'real' P4 that was hastily thrown out to compete with AMD when Intel discovered they were having major scaling problems with the PIII. If you decide in the end that you DO want the P4, do yourself a favor and wait for the Real one to come out.