Well, if you are going to use Tualtins then I think that the only option you have is the Iwill.....no other mobo manufacturer produced a dual PIII mobo with tualatin support.
5-8% of increase surelly will be worth it also
The motherboard is stable, has good oc options and good features. I can tell the following from my personal experience with it.
Integrated sound. It's good enough for me as I'm no sound loving guy. It's adecuate for games and for playing CD
Overclocking options. They are good you can vary the FSB from 66-200 in 1 MHz increments, the only problem I find is that you are usually running a higher FSB than then one you inputed. Currently I'm running at 100 MHz, but using WCPUID I can see that I'm running at 102 MHz. YOu can vary with a software menu the Vcore of the two CPU indepently, and can vary the DIMM Vin with a jumper.
Tweaking: You have lots of options at the BIOS including the running of the memory syncronously or assyncrously. YOu can adjust the CAS, the bank interleave and the agggresiveness of the other memory settings.
Connections: you have 3 USB headers, one in the usuall place in the connections of the mobo and two other headers that will need a jact to connect 2 more USB ports each. You have an integrated network adapter that I haven't had the chance to test yet (as I don't have a home network, but in the future I'll test it), a card reader port, a IR port and a SMPbus, if you care about them.....
I'm very pleased with this mobo a fully recomend it.