I actually find that they are simple to tie once you've got the feel for it.
My favourite wraps at the moment would have to be the Popowrap (nice and roomy, easy to adjust for fit, too, never seem to allow wicking, dry quickly), the Airflow, and the Thirsties aplix wrap. I like the Nature Babies, too, as they are soft, but I find they allow a bit of wicking sometimes.
Did you know you can get a pack of 10 Disanas for about £22? I bought some from the naturalnursery.co.uk, as they do individual nappies or a pack.