Ive been quite happy with my Gigabyte DS3 , nor have I heard anything negative about it here.
Go with the e6400, the 8x multiplier makes 3+Ghz much easier.
Any name brand pc6400 memory will do, look for a lifetime warranty and support for 1.8v, the G.skill stuff is going for $180 for 2G, corsair is $180AR
$760 from newegg
plenty of money left over for a good heatsink, like an si-128 or big typhoon