I'm currently running 3 AV systems as follows: Main lounge - Yamaha 1092 amp with JBLControl 1s and Rel storm Bedroom - Harmon Kardon AVI100 with nasty speakers London Flat - Sony 940 with Wharfedale Diamond 8.1 fronts and Loudpanel NXT rears. I also have floating around a Yamaha 2070 pro logic amp, a Rotel RC870/RB870 pre/power combo and a pair of Infinity Kappa 8s (4 feet tall and 50kilos each). I get lots of enjoyment out of all 3 systems. I'm now keen to add the Infinity speakers to the main lounge system. Do you think there is anything to be gained in using one of the spare amps to drive the Kappas (ie feed the preout from the 1092 straight into the rotel power amp or the preins on the 2070). The Kappa's can also be biwired/biamped so another option would be to use one the spare amps for this purpose. However, if I start using the 1092's tape loops as extra preouts do you think I'll experience any lag from the extra circuitry the signal is going through? Any thoughts on the best use of the above items in the main system would be welcome. I'm particularly keen to see what people think about using old Yamaha amps just as power amps (the 2070 has couplers for the front 3 channels and they can be had on ebay for about £100-£150). I can also find some budget for upgrades. My inital thoughts on a next step are to swap the 1092 for somthing like a 630 and use the 2070 as a slave to power the front 3 channels or alternatively should I go for a new AZ2 when the prices drop a bit more?