We've had another website since we started on Etsy, although it never used to get much traffic. But we recently had it completely redone, and the sales are starting to pick up quite a bit!
I think it's definitely worth it if this is your business more than a hobby. With your own site you have complete control over the look and feel of your site, which to me, is very important.
Here's our new site: www.organiluxe.com