Zu is not the only speaker company that offers a 30-60 day approval period. Tekton is another example. However, I suggest that you give Zu a call. Sean, in particular, is very helpful.
There are two integrated amplifiers for sale on A'gon: YBA Integre DT (the "old" design) for $1775 and Audio Refinement Complete for $500. In particular, the Audio Refinement (which was YBAs second line) is a bargain and sounds really great. Here is the link to the Stereophile review: http://www.stereophile.com/integratedamps/499ar/#jBfHwJoWTj6yqwAb.97
There are two integrated amplifiers for sale on A'gon: YBA Integre DT (the "old" design) for $1775 and Audio Refinement Complete for $500. In particular, the Audio Refinement (which was YBAs second line) is a bargain and sounds really great. Here is the link to the Stereophile review: http://www.stereophile.com/integratedamps/499ar/#jBfHwJoWTj6yqwAb.97