Nothing wrong with the 60.5's. For this line of amps, they are the cheapest mono blocks offered. If you are not set on monos, the XA30.5 is their stereo amp of the same design. I own it and the XA100.5's and they are much more alike than different. The 30.5 is about half the cost of the 60.5's.
All of their XA.5 amps put out much more power, maybe 3 to 4 times as much as their rating. Example: the 30.5 is rated at 30 wpc. That is the amount of pure class A. When Stereophile tested it, it put out around 130 wpc into 8 ohms and about 200 into 4 ohms. It just transitions to class AB after 30. I think you would be surprised at how loud even 10 watts can be but it is nice to have all that headroom.
All of their XA.5 amps put out much more power, maybe 3 to 4 times as much as their rating. Example: the 30.5 is rated at 30 wpc. That is the amount of pure class A. When Stereophile tested it, it put out around 130 wpc into 8 ohms and about 200 into 4 ohms. It just transitions to class AB after 30. I think you would be surprised at how loud even 10 watts can be but it is nice to have all that headroom.