Don't Cerilica do a titling app based on the Vantage engine specifically designed for web work? Maybe it's a little basic for your needs (I think it's sub 50 quid), but they're clearly thinking in that direction. Of course, the more different variants of a complex piece of (actively maintained) software you supply, the more of a configuration hell it becomes, so it's important that if you do have multiple variants you keep them to a minimum.
I can also recommend using Compo for web work which tackles the problem from a completely different perspective. I forget if it will anti-alias your drawfiles for you, though I have a suspicion that it might - you certainly get standard RO anti-aliasing on any text you use.