wwstereo is an authorized Klipsch dealer. The B-stock are basically speakers that are in perfect working condition but may have cosmetic blemishes, etc. I.e. lets say a customer bought a set, decided they didnt like them and returned them to the store, those can't be sold as "new" anymore, so they're sold as B stock at a reduced price.
As for wwstereo, they are very good guys, but their website is misleading, they list a lot of speakers as b-stock but they say nothing about availability. I was going to purchase my setup from them but they had no b stock in stock and weren't sure when they were going to have any, which is understandable, but frustrating.
As for RF-83's, they are fantastic speakers, but you *will* need a beefy amp to power them properly. The other issue is you want your front l/c/r to match, so that means you're going to have to look at minimum at a rf-62 center, preferrably an RF-64, which is a $1000 center channel.
Frankly $1.5k isnt going to come close to getting you a setup built around rf-83's.
I would look at something similar to mine if you want Klipsch. RF-62's left and right with an RC-62 center channel. They are not so powerful of speakers that they can't be driven by a decent $500-800 AVR.
Klipsch RF-62 L/R, RC-62 C, Energy C-100 SL/SR, HSU VTF-15H, Marantz SR7008.
"All speakers sound good when you're on a coke binge in the middle of an orgy." - Heebdawg16