Welcome there is a lot of knowledge here but each of filters it through our personal experience. So do your own research and use this site a resourch to help you make the best decision for you. You can start with this site:
I chose the Da Vinci but the best advice I can give is to go to a clinic that specializes in prostate treatment and all of the treatment options available. In that situation you will get unbiased information about the various treatments. I cannot over emphasize the importance of having the best and most experienced surgeon possible. There is a huge difference in the outcome based on who is doing the surgery as you will see in the above site. The ford clinic is considered one of the pioneers in the da vinci method and is now doing the procedure on an out patient basis. I didn't go there but I got a recommendation from one of their surgeons for a surgeon in my area and was pleased.
Don't look to your doctor for post op rehabilitation. Use this site. The thread in this site "Vaccum pumps" has the best information that I have seen for recovery. Particularly posts by "Swimon" She knows more than the docs. I wish I had found this site six months ago. I have only been here a short time and learned more about post issues than in the last six months. Good luck
56 year old male. 02/06 PSA 5.5 Subsequent Gleason 3+3=6 DaVinci Surgery 7/06 fully contained, returned to work (desk) the following afternoon, clear at 3 month check up, no pad 1 week after cath removal, but still occas. leaks after long day. No ED prior to surgery. ED since without improvement. Able to orgasm with help from wife and vibrator, but no sense that erection is returning. Drugs, no effect. Going to try the pump.