BIOSTAR traditionally has some sick HTREF clocking capability, IIRC the boards capable of pushing 400, 2 of the 3 were Biostar the other was some cheap nVidia IIRC.
That price point might have me giving it a whirl. The CHIV appears to be limited like most ASUS boards to around 300.
Moot if you are getting a BE chip but if you are not, or want it to bench some AMD stuff...the biostar *might* give you an advantage for sempron/athlon clocking.
As for RAM... I have no recommendation on that.. I get whatever cheap RAM I can find and bend it to my will
Have not seen much any 1800+ that cant run 1600+ 7-7-7
stock 1600 MHZ RAM running 7-7-7 is a little different. One set could one set could not.