I find that most of the porters & stouts that can get up to the 10% mark tend to be nice easy drinking, almost too easy
I'm not overly into very hoppy beers, some IPA's can get a bit too bitter for my liking at strong levels, but
this Riverside Seventy Seven I had recently went down very nice (you wouldn't know it was 7.7% by the taste).
Prices here can be pretty expensive, although I was at a dark beer night the other week and they had four different beers on hand pumps (hand pumps are pretty rare in Sydney), at $10 a pint (what's that about £5.50?) which included the aptly named Othello's Curse (9% i think).
You pay about $6/7 for a schooner of Carlton Draft (popular piss water) around here so I can't complain.