Listening is definitely the best idea.
I demoed a CDQ with a Cyrus power amp, and really liked it, and like you, was tempted by the upgrade path. Being able to add another power amp and power supplies was tempting, but when do you stop? The set up wasn't necessarily warm mind, but it had fantastic detail.
I went back and listened to the CDQ attached to a Caspian integrated as I wasn't entirely convinced the Cyrus kit would suit my speakers. I was very impressed, so I ordered the power amp. Now it's here, I love it.
I also heard the new MF power amp, the new Quad, a Kandy and the 8200P, and I'm pleased I did. There really isn't any better advice than to go and listen to kit, that way you will know when you've heard what you need to buy.
Hopefully others can give you some more suggestions. Good luck.