The general thinking is that Athlon's tend to have a performance advantage at the same price, or vice versa.
Here's a link to Extreme Tech from someone else's post.  They put a lot of thought in putting together their $1,000 Athlon gaming rig, which follows their earlier $1k Pentium rig. [taxes and shipping excluded]
http://www.extremetech.com/article2/0,1558,1558045,00.asp"Barton" Athlon XP 3000+, 400MHz bus    
Fan: CoolerMaster CP5-6J31C-01          
Motherboard    Shuttle AN35N-Ultra       
Memory    512MB Kingston PC3200          
Case    Antec SLK3700AMB + Power Supply 350W    
Hard Drive    Western Digital WD800JB    DVD-ROM/CD-RW    Lite-On LTC-48161H    Graphics ATI Radeon 9800 Pro 128MB    Monitor    19" ViewSonic Optiquest Q95          
Speakers    Logitech Z340          Audio    Sound Blaster Live 5.1          Floppy    Mitsumi                Keyboard    Microsoft Natural Multimedia      
Microsoft Intellimouse Optical       
Operating System Windows XP Home