You won't really find a decent/legal exchange that doesn't require some forms of ID verification. I've had success with Kraken and would recommend it, though their site is a little laggy at the moment due to obvious increased traffic.
If you want to use a visa I recommend using coinbase. It is easy to set up an account and you dont need to verify via ID to use your visa, you are limited in how much You can buy without verifying your account. They do charge a fee though. Thats the only place I know of that you can use a credit card but Im sure there are other exchanges out there I just dont know of any.
Ok mate, thank you very much for the input, much appreciated!
I'll check that one out!
Coinbase is terrible. You'll likely never get verified at all. I had money stuck on there for months with no answers to dozens of emails to support, though I was selling coins so maybe it's easier buying.