Yes, I did a little thorough research myself (specifically on audiokarma). And it looks like there are great things to be said about the KA-6100.
I also saw a listing of the KA-701, the person is asking about $30 for it. Even though it is functional and all the switches work, the tips of some of the switches are missing. With that said, I might be leaning towards purchasing the KA-6100 (it has been refurbished anyway).
I finally found out what model my Polk speakers are, they are R15s, so they should be compatible with the KA-6100.
Thank you guys for your input.