component set comparison

I need a component set to complete my front stage. It also will comprise of 2 pair of Adire Extremis, so the majority of the midbass will be taken care with those. I've narrowed my choice down to four sets: Zapco CK16.2, PolkAudio SR6500, RE XXX, and Pioneer TS-C720PRS. I know you're thinking why the Pioneers? Well I read the reviews in CA&E which reviewed the Zapcos, Polks and the Pioneers and the Pioneers rated a half point better than the the other two. That's why they are in the mix. The fact that they are half the price as the others also helps. My problem is that I can't listen to these anywhere around here. I do have dealers for all these brands, but they don't have these models in there boards. All I can go by is what people say in forums and mags. The best set if had so far were a pair of Focal 165v's a couple years back so any of these should blow those away. Thanks in advance for your help. Oh, the HU is a Pioneer 980BT. Amp: Eclipse XA4000 and they will be going in custom fiberglass enclosures. sub will mostly likely be a TC Sounds LMS-4100 12". thanks againPioneer DEH-P980BT, Zapco DCREF1000.4,Pioneer TS-C520PRS, Adire Extremis, MTX TA91002, TC Sounds TC-3000 15"

thanks mike for the reply. I'll call my local Pioneer shop and ask again if the have any way I can audition the 720's or 520's. What you have said is what I've picked up from the mags and forums. thanks againPioneer DEH-P980BT, Zapco DCREF1000.4,Pioneer TS-C520PRS, Adire Extremis, MTX TA91002, TC Sounds TC-3000 15"

Have you heard JL's ZR series? What is your budget?