You could look around for pre-fabricated "floater frames" if you don't want to go to a professional framer. Depending on the size of your panels and how deep they are, you might be able to use something like this:
for an inexpensive solution. (Blick has wood floater frames, too, though I've found they can be a little finicky when getting a cradled panel to attach properly; but it works, too...)
These would likely work if you're using 3/4" thick cradles (such as you might find on many of the Ampersand cradled products). Note that you should probably check with the gallery to make sure these are of high enough quality (they're very inexpensive).
The "floater" aspect means that your panel will be mounted with a slight gap around all four sides and provides a more contemporary look to the finished piece (as opposed to a more traditional frame, which can overlap the edges of your painting). Hope that helps.