My SME Server has been humming along fine for years on a relatively ancient PC in my basement providing the Internet gateway for our home. I'd like to replace that really old Dell tower with some kind of new box, preferably something more appliance-like in terms of not having super loud fans and having a small form factor to sit on a shelf. However, I've completely lost track of the current state of small server systems.
Anyone have recommendations for a nice small server on which to run SME Server?
I don't need it to have a lot of disk space - mostly want it to have two high speed NICs and a good processor. I'm NOT interest in building my own box (been there, done that many times). I just want to buy a box, insert a CD, go through my config and get rid of that old box

Any recommendations would be greatly appreciated.
Thanks,
Dan