Hi Dan, I've had a MM Paradigm pump for about 3 years now and just started on the CGM about a week ago. I like that the MM pump has it's own CGM and I only have to have one device - keep in mind you'll steed need to wear 2 sites on your skin, one that's hooked-up for the insulin and one "wireless" one for the CGM - but so far, it hasn't been as a big a deal as I thought it was going to be. I know a lot of people on this site don't really like MM and don't mind using two different devices and have gone with the Dexcom and the Animas Ping, so I guess you can keep that in mind. But in 3 years I've been very happy with MM. Their customer service has been great and I love my pump.
I had a lot of the same concerns you seem to have about being "tied down." I'll be honest, you do have to get used to it, but after a few months I loved the flexibilty and freedom that the pump gave me that I would never even consider switching back to MDI. It's nice to be able to make treatment adjustments on the fly. If I'm unexpectedly really active one day, I can just turn the basals on my pump down. I do a lot of long bike rides, running, and swimming and the pump has been awesome for my training. Also, if I'm eating dinner and decide I want to get more mashed potatoes, just a few button pushes instead of another injection. I recently had to be without my pump for a few days (a long story) and it was actually a nice reminder of just how awesome the pump is for me and how much I love the flexibility. I'm not going to lie, it was a little nice to not be "hooked up" for a few days, but the trade off was definitely not worth it.
Check out this site: http://www.2betr.com/ It has some pretty good points and is hilarious (IMO, but I have a really sarcastic sense of humor!) The guy behind it works for Nike. I met him at a Diabetes Expo and what he said to me and reading his pamphlet really helped change my mind about the pump. If there's a Diabetes Expo coming up in your area, I'd highly recommend going. You can talk to the different pump company reps and even try some of their infusion sets. It might help you with your decision. I think you can find out about expos in your area on the ADA website. Good luck!