From what I experienced, you're best going with CM9 or CM10 stable builds, they share working-out-of-the-box BT, generally better battery life than PAC, and plenty of RAM (if you use it wisely - I usually got 240M on CM9 and 220M on CM10).
Do not consider current CM10.1, Slim, AOCP, PAC, Xylon, etc. as they are all Android 4.2.x and BT has glitches. Also eats more RAM.
If you don't have version-demanding apps, you can even revert to the old school CM7.2 for incredible smoothness and 250+MB of RAM...
Sent from HTC Incredible S @ CM10.1