I am seriously considering adding an A21 to my system.
I have Kef XQ40 L/R, XQ50c center, B&W CCM616 ceiling for surrounds, and Kef IQ10 for Heights. For subs, I have my Velodyn Optimum 12 or my older Def Tech Powerfield 1500. For AVR receivers (to act as Pre/Pro) I have an Onkyo TX-NR1008 and a Denon AVR4310CI. The Denon and the Def Tech sub are currently on my second system. For music I have a Denon BDP2010CI, IPOD Classic 160, and Apple Tv with my labtop (decreasing order of quality). I-Tunes is all recorded in lossless except purchases.
Down the road I plan to purchase a preamp with HT bypass (NC2100?) for even better two channel. My concerns are heat. The A21 will put out about 90 - 150 w when on driving low volumes. That is like another body in the room giving off heat. My room is about 13' wide, 16' deep with 9' ceilings.
How close would the NC2250 sound and how much less heat would it give off? I am in Florida, and my media room can get warm if I have had things running too long.
Main Kef: Reference 205/2 & 202/2c, Surrounds: Kef XQ40, Velodyne Optimum 12, Integra DHC 80.3, Ayre K-5xeMP, Oppo BDP-103, Bryston 4Bsst2, Parasound Halo A31. Second B&W: 685 (3), CCM618, Def Tech Powerfield 1500, Onkyo TX-NR1008, Zone 2 Klipsch AW650.