Damn Yield, still no good prices in Canada? I was about to recommend a few excellent vendors at awesome prices, as I almost bought this board. Only thing that stopped me was the lack of 4 mounting holes for my Alpha 8045.
I have the Asus and my only complaints are about the BIOS. The shipping BIOS is miserable, if you aren't a pretty experienced troubleshooter or system builder, you will definitely want to read up prior to installation. Also, the BIOS releases to date are NOT as good as some other boards, particularly the 8KHA+. Of course, this is only really a consideration if you want to overclock. It will be even less of an issue if you decide to go with the 333mhz parts of those chips you listed. Board layout is good, no issues with a full-sized PCI/AGP card being obstructed. IDE sockets are too close but there's plenty of room around the socket for any type of cooler you wish. It has the most robust I/O plate of any of the Nforce2 boards I've seen to date (4 USB, sp/dif coax out, full 3 mini-plugs for 5.1, mic, line-in, 2 LAN, 2 PS/2, serial, and parallel). 2 more USB headers, a game port and firewire are available using 2 slot plates. You get SATA RAID which is pretty useless unless you have SATA drives; using your IDE drives will cost you $60 in adapters. Front control pins are a bit jumbled up. Manual is excellent and detailed with schematics, and you get both a quick reference card as well as an adhesive mobo layout diagram. Comes with all cables including 2 SATA. Bundled software is nothing too exciting, although AsusUpdate and AsusProbe are very nice. 3deep is a decent proggy to have as well, I haven't seen it since my Voodoo5, but it tweaks color settings nicely. This board features full Sound Storm support, but you're tied to Asus' proprietary version of the Nforce2 UDA's, as they vary somehow from Nvidia's reference.
Again, it all comes down to what you will be using the board for. A7N8X-DLX is an excellent Jack-of-All-Trades board, but if I had to do it over again, I'd probably be running the 8RDA+. I'm sure the Chaintech and NF7-S are also fine choices in-line feature wise with the A7N8X-DLX, so my last consideration would be number of users and availability of user/forum support.
You should probably define your needs better, as well as what components you plan to use with it to refine suggestions.
Chiz