A8N-SLI Premium - it's like Deluxe, but has many bugs/issues fixed. Vcore volt mod is so easy, just two wires and you get up to 2v
A8N32-SLI - latest entry, don't know much about it, probably the one to get.
My overclock results with Premium:
Athlon64 3000+ (1800MHz) would not go higher than 2250MHz on MSI K8N Neo2 Platinium, while on Premium it runs stable at 2400MHz.
FSB is 272MHZ, multiplier is 9x, HTT 3x. This beats some statements that A8N is FSB limited. My mobo boots with FSB at 300MHz.
My memory is 4x512MB DDR500 Kingmax Hardcore which is not on the qualified list. I set it to DDR266 and it runs at ~170MHz effective, at CL2-2-2-5.
The above setup, combined with 7800GT (500/1.22GHz) gives me 8382 points in 3DMark 2005.
Hope this helps, Chris
EDIT: vcore volt mod here: http://www.overclock.net/amd-motherb...premium-2.html