I currently have an old Fisher Dolby Pro Logic setup (can't beat the price of free!), which I'm looking to upgrade with an Onkyo TX-SR501 receiver refurb from ecost.com. The Fisher system came with two towers, each with a 12 inch woofer, a 5 inch mid-range, and a 3 inch (or so) tweeter. The surrounds that came with the system are junk, and I plan to replace them. For the sake of my current budget, do any of you think running the Fisher towers would render acceptable performance for now, or should I start looking for new mains to replace my old towers? From what I've read in the forums, it seems that speaker sets are generally sort of frowned upon, but has anyone had any experience with the Onkyo SKS-HT510 set? There's some refurbs over on ecost.com for 99 bucks, and I figured that, with the new receiver, they'd be a decent upgrade from my dated system.