The asus is rock solid, and a very good board,
the UD7 is a very special board, very nice and solid,
never really seen great bang/buck with the g1, but with that said ......
all are good,
u cant go wrong, wouldn't get the g1 due to less ram slots,
not much else to offer,
the asus has over clock key thing for easier bois access,
and the ud7 has a really nice set up. ... but only 4 dims not 8
that narrows it down to the Asus.
thats my reasoning at least,
all are killer boards though,
recommendation - the asus
my choice - the ud7 -its just to dam pretty with so much orange.
BTW all will have good enough internet controllers and audio, those card are nice extras but not required at all,
the asus has all that stuff built in already, nice high quality on that asus board