I'd think CM7 is the way to go to jump into a custom ROM that you could get working the fastest for this phone. CM7 has been out for a LONG time and it's been well tweaked and it's SOLID!
BUT... CM9 is what's coming (and for more and more phones/tabs, it's what's already here!).
I say even if it takes more effort now (vs. an older and more stable CM7), go right with CM9 and let's get this party started!
Current Phone: Samsung Galaxy Note 3 (SM-N900A)
Case: Naked (soon to be Trident Cyclops)
ROM: Stock 4.3, rooted
Int Storage: 32gb
Ext Storage: AData Premiere 64GB UHS-I/Class 10
There is no "Truth", only perception and deception