Well, if post-bac classes are what you are trying to replace, a CC isn't going to offer the upper-level courses you need. Now if they are lower-level courses (ie. BIOL 1, etc.) then yes, you could retake those at a CC.
People will tell you different things in regards to taking/retaking courses at a CC. This issue has been discussed to death on SDN. If you read some of my other posts throughout the forum, you will see that I retook a TON of classes at a CC. Granted, I think I have a pretty good explanation for it (single father, work full-time, etc.), but the decision is up to you.
If you have the money to burn, I would retake them at a university to be on the safe side, but if you have a good reason as to why you retook them at a CC, then I wouldn't worry about it.
Even with your GPA, you're not far from being an "average" applicant. Are you replacing F's, D's or what?
Remember that your GPA alone doesn't get you in. There are plenty of people who get in with sub-3.0 GPAs and ones who don't get in with 3.9s. Remember that your application is holistic. Your GPA is not getting you in by itself, nor is a 35 MCAT. It's all about the entire package. You just need to figure out how to market yourself in your own specific situation.