A couple other excellent sites to help you do research, find a doc & talk with other people are:
www.implantinfo.com
www.implantforum.com
Implantinfo.com gives you basically a checklist of how to go about locating & researching a doc, checking his/her credentials & also if they've ever had any malpractice claims against them, etc.
Personally, I used implantinfo.com to guide my trek towards & following the surgery. I wanted to go from a very small B to a C-ish. I talked to 4 different docs in my area (these are usually free consults so USE them to determine if you are comfortable with the doc).
I went under the muscle, with a very light scar under the nipple. 36B to 36D. The pain was amazingly miserable the first day and part of the second day. The unders are a longer recovery period because they go into the muscle. But I didn't like the idea of the implant just sort of being held by only skin. Talk to people and doctors about which one you would prefer. The doc I chose also generally did unders. I think alot of FBBs get overs because the recovery time is very quick.
I think the surgery lasted a couple hours and then they moved me into the recovery room to sleep for a few more hours and then get my ride home. Definitely make sure you have a ride home because you CANNOT drive yourself. I'd say generally w/ unders the first 2 days suck the big one (and definitely use the painkillers!!!!!). It feels like an elephant standing on your chest. By Day 4 I was off the painkillers. I took a week off from work to recover. About a week after I stopped the painkillers I got unexplainably depressed - this was the detox from the painkillers. (After that experience I have HYUGE respect for what its like to come off of an addiction...)
You definitely don't want to and generally can't lift your arms above your shoulders. During the recovery period I moved all my dishes, etc. to the counter level so I wouldn't get stuck having to lift my arms high. Driving was what I had the most problem with because it was very hard (and hurt) to turn around like when backing up. Those things where I couldn't turn my whole upper body, just hurt. After 3 weeks 95% of the pain was gone. I went out dancing all night w/ no bra that weekend.
I started back in the gym in 3 weeks but stayed away from upper body. I sort of worked into upper body as it was comfortable. I started training for a BB competition 3 months after the surgery. My chest was definitely tight and took some work to loosen up the scar tissue from the implants, but it was all good

I asked my doc before the surgery if there would be any impact to my ability to develop my pectorals and he said no. Granted the guy was not a specialist in strength training, but that is what he said. I can't say I've experienced anything that made me think it affected my chest development since then.
Two things that resulted from the surgery - I can't lay flat on my chest without it feelign weird and I have to strap 'em in REAL good to do any sort of bouncing or running.
I think if you check out the two websites above you will find almost everythign you could possibly need to educate yourself & make the decision.
Good luck!