For AMD, Nvidia make best chipsets, best mobo is probably Abit NF7 due to features, price & overclockability, but Epox are good too.
For Intel, Intel make the best chipsets. Abit are again generally well liked there, for the same reasons as their Nvidia AMD boards.
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Epox 8RDA+ rev1.1 w/ Custom NB HS
XP1700+ @205x11 (~2.26Ghz), 1.575Vcore
2x256Mb Corsair PC3200LL 2-2-2-4
Sapphire 9800Pro 420/744