So, I've got this 955 that's sitting around (sig rig), doing nothing (daily driver), but needing some love (I'm not that abusive).
Right now, I've got this: GIGABYTE GA-M68MT-S2P. It's not a bad board, but I'm finding it lacking in some of the newer features of modern motherboards. No USB3 means slower external backup drive transfers. No SATA3 means newer, better HDDs and SSDs are wasted. No SPDIF output isn't quite as big a deal, but it means I'm effectively down one USB slot if I want to continue to use an external DAC and amp. I'm not miffed by the single PCI x16 slot, as I'm not investing in this as a multi-monitor gaming monster, but I am annoyed that with one dual-slot graphics card I lose one PCI Express slot and the other can't be used without blocking off air to the graphics card. Top-facing SATA ports make it difficult to plug stuff in with a big graphics card in the way.
TL;DR: I'm looking for a new motherboard and I'd like you guys'/gals' help.
AM3+ (need compatibility with my 955)
ATX or micro ATX
SATA 3 (more is better)
USB 3 (more is better)
8-16GB memory capacity
SPDIF output or at least 5 total USB slots (including heads for the case)
At least one accessible PCI Express slot that will not choke a dual-slot graphics card
Side-facing internal SATA ports
Since my case has more cons than pros, I'll be replacing it with a Fractal Define Mini (if mATX) or R4 (if ATX).
Heh, I think I found a good middle-ground between the two: GA-990FXA UD3 for $145. Sabertooth has more USB 3 but the expansion slot layout in the 990FXA UD3 looks much better for my uses. That PCI 1 slot above the first x16 means I can put a sound card above the graphics card without interrupting air flow to the graphics card. A second x16 slot three down gives a one-slot space (assuming a dual-slot air cooler on the first card) if I decide to add a second graphics card.
Thanks for the suggestions guys. I'll leave a note somewhere around the house with both boards on it and see if anyone is nice to me for Christmas, or if I'll be treating myself.