I bought a pair of CS7.2s second hand. Occasionally I feel like I bought a Mercedes that I can't afford the insurance and upkeep on. But whenever I audition other speakers it becomes pretty obvious that the Thiels are doing some things that alot of other speakers come up short on. Purity of tone, resolution, superb deep natural bass, lack of coloration, etc. It's addictive. I drive my CS7.2s with Bryston 7B ST monos (Meridian 508/561 front end). I've tried some other amps such as ML 336, Classe CAM 350, Krell FPB 300, and McIntosh MC602. They better the Bryston 7Bs in some areas, but I found recently that adding a tube line stage provides the biggest bang for the dollars spent. So far the ARC LS25 works very well. Cable is also important with Thiels. I use Transparent Ultra ic/sc with good results.