You won't go wrong with one of these:
http://www.amazon.co.uk/Enjoydeal-O...e=UTF8&qid=1433360892&sr=8-2&keywords=hammock
It's pretty much the same as the old group buy hammocks that we had here on BCUK, that I used for years before I bought a Blackbird XLC. I still can't choose between the two; I want to like the BB XLC more because it was so much more expensive, but to be honest, I sleep really well in both.
I'm 6' 1" and I sleep really well in mine, and my 6'3" brother in law does the same in his.
If you do buy one of these, you'll have to get your own suspension etc. (either make or buy), and make a structural ridgeline to suit your height, but that's easy enough and I (or many others on here) will help you with that.
If the worst happens and you decide that you don't like sleeping in a hammock, you will still have a sweet, lightweight hammock for the garden, woods or beach that hasn't cost you a fortune.
Cheers, Michael.