I'm not a fan of rotators, but I think your situation demands it. I'd suggest a Winegard 8200U, a CPA19 preamp, and a rotator. You could try the first two without the rotator and assess your results, but you've got weak signals in too many directions. My first suggestion would be a 41 degree heading.
http://www.solidsignal.com/pview.asp...nna-(HD-8200U)
http://www.solidsignal.com/pview.asp...lifier-(CPA19)