What is the major difference? IS it worth shelling out the extra hundred dollars?

No difference apart from clock speeds in memory and core. You can probably overclock a x850XT to an x850pe XT and save yourself the $100. In my opinion its not worth it, as the x850xt is fast enough anyway. I'd probably go for a 6800ultra or 6800gt though. AMD Barton 3200 1024mb PC3200 Ram Radeon 9800 Pro 128mb A7N8X-E Deluxe

save money for the 7800 from now, by the time geforce 7800 comes out, you should have saved enough for it. lol, if you can wait for that long. P4 3.2GHZ kingstone 1GB DDR 3200 ABIT AS8 mobo Nvidia geforce 6800 Soundblaster 24-bit audigy 2

supposed to come out july 22nd or june 22nd, can't remember. the 7800 will be awsum. p4 3.0ghz @ 222X15=3330mhz 512mb pc3200 dual channel @222mhz 80gb wd hdd/40gb maxtor when on linux 8x agp geforce 6200 @ 530/585can't unlock extra pipes. plz help if you can Audigy 2 ZS<b

Have a look at this ;). http://www.theinquirer.net/?article=24008 Asus P4P800 P4 2.4c @ 3000 Mhz Zalman CNPS7000A-Cu HSF ATI Radeon 9800 pro 1 GB OCZ pc 3500 ram Sound Blaster audigy LS

ahhhh, the sweet game of chess. nvidia is going to come out on top. but i hope they will put some opengl power into those cards to ati won't take the glory in that area like they always do. p4 3.0ghz @ 222X15=3330mhz 512mb pc3200 dual channel @222mhz 80gb wd hdd/40gb maxtor when on linux 8x agp geforce 6200 @ 530/585can't unlock extra pipes. plz help if you can Audigy 2 ZS<b