We don't have a huge range here, but it really depends on what you want. I have wildtypes, italians, a rosetta, tuxedoes and a texas A&M. Most of them are wildtypes and italians, because they're the most common around here and because I can feather sex them (which I find more reliable than vent sexing when they're younger). I love the look of the other mutations, but I've had issues before with tuxes and A&Ms. I bought four seven week old 'females', but three turned out to be males. At least with wildtypes and italians, they are easy to feather sex.
In the end, it's up to you though.