I've read pretty much every guide on character creation or being a n00b in general that I could find. (rumbaar was particularly helpful along with mxovault) but I have advanced a few levels now (Hyper Jump 4tw?) and I am beginning to wonder about Stats in the mid-late levels.

Do I want to consistantly dump points into my 3 primaries or will I eventually need to balance them out for PvP and Teaming at later levels?

The important thing to keep in mind about your stats is that you can "re-hack" them at any time by doing the stat hack mission available at any archive vendor.  Especially if you're into PvP, you'll probably want to have a spare stat-hack tool on hand just in case you need to switch jobs at some point.

Generally, you'll want to focus on the 2 stats that impact your chosen class most directly, right from the get go.  If you want to switch say from MA to guns later on, you can always just re-hack.  Of course, some people advocate balanced stats, or keying your stats more to defense against specific adversary types.  *shrug*