As can be seen from the signature, I use a 'slimline AVR, namely the Marantz NR 1501. Accommodating it in my AV rack is easy due to it's relatively small size and I have never had any overheating issue due to poor ventilation as it is on a shelf with no sides and about 3" headroom (see: http://www.whathifi.com/forum/your-system/my-finished-for-now-system).