I'd agree with smsteph. Aim for higher with your grades. I ended up going to a T14, but my ~3.5 from a top undergrad institution was a liability, not an asset.
If you want to take the analysis beyond the numbers: think of what they would look for next after they see your grades and a great LSAT score. If you were tied with someone with exactly comparable numbers, what would the tiebreaker be?
I think the next most important thing in your application package is a tie between your involvement (i.e., your resume) and what your recommenders say about you. Filling yet another bullet point on a resume is less impressive than a well-written endorsement from a professor who knows you very well. Look at it this way: the audience you are presenting your package to will definitely listen to solid recommendations from other academics. Your professors, more than anyone else, have the authority to impress upon the admissions committees your maturity and poise, just how intellectually curious you are, what your motivation is for going to law school (these days, it shouldn't be money), what kinds of ideas you have and how you follow through on them, and what kind of contributions you will make to the law school, both in and out of the lecture halls.
On the other hand, your involvement is important. There, I think it's more important to demonstrate depth, not breadth. A focused resume trumps a scattershot one. Sounds like you are involved with a couple of things you care about. Stick with those. Also, working that much while going to school definitely bears mention -- it means you can handle responsibility, and I would definitely include it on my resume.
Finally, I'm sure you have everyone asking you this, but: why do you want to do this? The loans can be staggering, and I have a number of friends who never found work. The market may be doing better again, but the law profession is still picking up the pieces, trying to figure out how things are going to work -- especially in Biglaw.
Hope this helps -- good luck.