Can't really tell you anything about the sailing characteristics of a 311 however the 311 is a boat I too am interested in. I'm looking for a shoal draft cruiser and have narrowed my list to a 311, an IP 27 Centerboard, and a Seaward. I looked at a 311 and really liked the layout and feel of the boat (same feel as the Catalina I recently sold). Didn't make an offer because the owner's unrealistically high price. If the I find one for sale that is priced within 15% of what it's worth I will make an offer. The Seawards are just too much money.
My question to you is what do think about how the IP 27 sails, my wife and I would use the boat for day sailing south of Fort Myers FL?