I'm not sure about the refurb v. recon question, but make sure that e-cost is a licensed Denon dealer. I bought a refurbed HK receiver from them which turned out to be a lemon. Ecost wasn't a licensed dealer and it turned into a major hassle. HK ultimately gave great customer service, but ecost customer service was non-existent.

M22's, VP150, QS4's, HK 630, HSU VTF3-MKII