THe speakers are recommended for 17 inches from-wall - that's probably what RBH designed the speaker's BSC for. 3 feet is a bit further, so you may lose a bit of bass but it'll be so insubstantial that it's not even worth fretting over - these things can handle power pretty nicely.
Besides that, away from the wall you'll get a deep soundstage and tonnes of output from both the bass drivers and the ports. Combined with your Epik Legend, you're not going to be starved of bass!
You may find, as I did, that the sonic signature of these speakers is very different from what you're accustomed to for the most part, - more natural and laid back up top - but ultimately I felt satisfied.