Here are a few stores I like:
http://www.omnilit.com
http://www.bookstrand.com
You can find non-DRM titles at both. OmniLit is especially good since they have a reader rewards programs. They also have a romance store -
http://www.allromance.com
Kathryn Lively - author of Dead Barchetta
http://www.deadbarchetta.com
It's a long, strange trip.... Only $2.99 in eBook!