i have had the ecs radeon xpress (micro atx) board in my htpc for around 5 or 6 months now and i am very impressed. it was the first rev of the board and chipset, also only 1 bios revision (after the shipping bios), also uses the ati southbridge rather than the uli. it has run problem free, slightly overclocked for the entire time i have had it and its in an aspire x-qpack, which is like an oven (no intake fan). the vcore only goes to 1.45v, vdimm to 2.7v, and not much tweaking options, but is running @ 11x225, 1/1 ram.
config -
3500 venice @ 11x225 1.45v
2x512mb pqi turbo tccd @ 225mhz 2-3-7-2 1t
ecs rs480 (same chipset as grouper with built in x300 vid)
2x160gb wd sata raid 0
liteon dvdr 1693s
6600gt
hauppage pvr-150
stock x-qpack 420w psu - 12v rail is around 14amps
so the basic 480 chipset works great in my experience. benchmark results are about the same as nf4 boards, a little better than dfi ultra-d, a little worse than epox 9npaj, but only a few percent separating all 3 boards.
very truly yours,
politenessman