What do I need to complement the Thiel CS2.4

I have the 2.4's in a combined HT and stereo. First of all, you do need an amp that can really drive them. Makes all the difference in the world. With that said, I woukdn't even look at a AVR... Go separates with an amp that can double it output into 4ohm. Also, get some good cables, Cardas match the Thiels well IMHO.

I recently used a Krell KAV250a and that does sound good, just replaced it with a Mark Levinson 334 and that sounds even better.

What are you planning to use for center, surround etc?

For a center, I highly recommend MCS1 and PowerPoints for surround. You will need to spend some money on good amps... no other way around it. Thiels do require plenty of power (quality more than quantity though). Look for an amp that doubles into 4ohm. McIntosh would be the exception to that (and they match really well!).

My stereo (which is also part of my HT) consists of 2.4's, MCS1 for center and surround and PowerPoints as rears. Krell HTS7.1 pre/pro (great analog section), ML 334 for L/R and a Harman Kardon Signature for the other 5 channels. Subs for HT only are a pair of Epik Legends.

Choose your amplification wisely, don't cheap out.

Has anyone heard about the
Vapor Cirrus speakers ?

Thank You to everyone
with the good reccomendations.