Go with the An35n ultra if you want, its a great board if it works but dont be surprised if you have problems with it.
Myself I got a AN board from newegg 4 months ago, it had problems with dimm slot 1 where it wouldnt recognize memory and wouldnt boot with ram in that slot. So i had to use dimm 2&3. A month later after owning the board i bought a vanilla 6800 card and having used that for less than a week the card began displaying GFX corruption, no game was immune to it even quake 1...it turns out that the memory controller on the AN was somehow being overvolted [not by me either] which ended up giving the agp to much volts, which damaged the 6800s core AND fried a $100 dollar stick of 512 ram in dimm slot 2. Another prob i had was that the board wouldnt run fsb above 190 EVER [ram now runs up to 230 fsb in my a64 system so go figure].
I rma'd the board to newegg, and exchanged the 6800 with BFG for a GT.
New board comes in, I test it with a piece of junk ram in all slots...It looks good to go.
I reinstall XP and get all my games installed, then get ready to go to bed then remembered that i forgot to turn off speed spectrum in the bios, so i do that and hit F10 to save settings and the system shuts down when i do that = Corrupted bios. 190 fsb wouldnt work with this either, which leads me ot believe that a certain number of AN boards have faulty memory controllers..
F*ck.
2rd rma to newegg.
Two weeks later i get the new board, ram slot 1 is again defective as ive come to expect from this series, but other than that everything is good even 200 fsb worked :Q, but i didnt want to use dual channel. So i said F this i spent to much money on fedexing and ended up ebaying the board-cpu-and hsf for $80 [and yes i explained not to use dimm1 to the buyer-since it had a piece of gold glimmering in the slot = risk of frying ram].
Also of note my brother has a AN board and he cant use dimm1 but other than that its good.
If you want a great board without the risk of problems i reccomend a vanilla NF7 board, it has better everything and wont give you headaches if you get a pos one.
And incase anyone is wondering if the problems were my own fault, theyre not, the system in my sig uses the exact same parts as the AN35n one did with the obvious exception of mobo and cpu. One month going and no probs not even a single bsod so far.