well, a designer that needs to edit html/css sound like a part of a full-design-stack solution to me. which means he does edit it for a non trivial amount of ti

well, a designer that needs to edit html/css sound like a part of a full-design-stack solution to me. which means he does edit it for a non trivial amount of time, so something like TextMate or Coda might fit the bill pretty well. If you are doing anything in a professional capacity (i.e. getting payed for it) then even a very slight improvement in productivity will pay for it self almost immediately when we are talking about a 50$ price tag.