Unfortunately you haven't gotten many (none to this point) suggestions. Most likely because this is such an "opinion based" question and answer, but I'll stick my 2 cents worth in anyway. The EpoX you menioned should be fine. I am not a big fan of EpoX but there are many, many devoted users of that brand. I am an ASUS user and have always been a proponent of their boards. They always seem to build good quality, stable platforms. Any current flavor of ASUS should give you the stability you are looking for. Good choices would be the A7N266 & A7N266-E (N-Force 420 series)or the A7V333 (which would give him more future expandability w/DDR333). Mind you these will be a bit "pricey", but you didn't mention a limit on cost.

Another option would be what I am using currently; the A7M266. Now, I know I might be hammered for saying that but it is a rock solid, stable platform. Yes, it is almost
ancient compared to the current offerings but it was one of the best boards of it's "generation", runs DDR- PC2100 RAM, runs AMD XP CPU's (with correct BIOS), has AGP 4X, etc,etc. The best part is that they can now be had for well under $100. I saw them at Fry's in N. Cal for only $69!! I have been running mine 24/7 for just over a year (I paid $158 for mine then) without so much as a hiccup. What more do you need?

Well anyway, I just thought I would mention that as a "third alternative". Good luck in your search.