I toss and turn a bit sleeping, but I will say I slept better and moved around less in a hammock then in my bed, and not because I felt constricted. Laying on a diagonal in a hammock I can pretty easily switch from my side to back. I sleep way better in a hammock then on the ground.
If you can, try out a friends hammock, or look at grand trunk who makes one for $20. Not the lightest, or very big but a cheap way to try one out.
OR... if you can sew even barely...you can get some 1.1oz uncoated ripstop from backwoodsdaydreamer.com for $3.00 a yard and make a super cheap and light whipped end hammock.
The benefits of a hammock keep going; not just a good nights sleep, a comfortable chair, clothesline, can easily attach your gear to the suspension lines and keep it off the ground, super fast setup, and I think they are pretty cool to look at.