So far I've gone through 3 different motherboards in the past 6 months. First, no matter what you do, don't buy any motherboard with a VIA chipset. The VIA chipset was put in place to support the 133MHZ bus motherboards. I installed it and everything worked great except 3D applications! (not good for your gaming system however) I would receive intermittent lock ups in 3D games. Usually between 5-15 mins. ->very frustrating<-
After going through numerous newsgroup messages I discovered that it was the VIA chipset. Their web page had updated video drivers but they were of no help.
Maybe they have new drivers now that better support the chipset but I would ONLY buy an Intel chipset on my motherboard.
Unfortunately for you, though, asking for a motherboard made today that will range from 800MHz to 1.5 GHz will be difficult. The reason for this is that the current generation of motherboards ranges from ~133Mhz to ~1Ghz. You may have to wait for the next generation motherboard to really get what you want.
Stay away from FIC, and ABIT. If you want to know why, first try to find ABITs web site, then try to find a tech support section. All they tell you is "check the internet newsgroups" 'good luck american joe'.
If you want to get one today, I would highly recommend the ASUS P3BF. It has an nice Intel BX chipset, (very standard), and supports overclocking, jumperless settings, and can go past 1Ghz. I have 3 PCs and in 1 years time ended up putting the exact same motherboard in all 3 PCs. I've started with a 233Mhz, gone to a 550 (overclocked to 733Mhz) and finally a 800Mhz (overclocked to ~900Mhz)
Take it from an avid Quake1/2/3 player, buy ASUS! http://www.pricewatch.com