I'm curious as to why you stopped using Omnifocus. I'm a PC user and use OF on an iPad because I really like it. BUT
If I had to go a different direction, I'd take a good hard look at Evernote, I think. Or maybe take a good break from technology altogether and go with paper. I've never been one to futz around much with my system. I just want it to work and not drive me crazy with syncing issues.