Just wanted to add my experience with the Emotiva LPA-1. I read everything I could get my hands on about this amp, hoping it would sound as good for music as the Parasound HCA-1000 (125W x 2) I have currently. I have never found any direct comparisons of sound quality of the LPA-1 versus any other stand-alone amp. First off, build quality is impressive, as everybody has said. A nice looking amp. But, SQ was my primary concern. At $ 500 with free shipping, I REALLY wanted this amp to compare favorably to the Parasound. Styles of music for comparison included rock, blues, reggae, jazz, and bluegrass played through Energy Ref. Conn. RC-10s.
The LPA-1 is a great performer, but it was outclassed by the Parasound in almost every category. Highs through the LPA-1 were bright and the midbass region was thin in comparison to the Parasound. Male vocals lacked weight through the LPA-1. Deep bass through the LPA-1 had more weight, but was not as tight as the Parasound. Imaging and soundstage were also superior through the Parasound. Sound appeared to be floating from further out of the speakers when played through the Parasound. This isn't to say the LPA-1 didn't play midbass well or the soundstage was absent; the Parasound was just better. I obviously can't say which amp is more "accurate" to the source, but I preferred the SQ of the Parasound. I would approximate the performance of the LPA-1 to be 80% that of the Parasound. Not a night and day difference, but noticeable.
As a quick note, I also own a Proton AA-2580 5 channel amplifier (80W x 5). The LPA-1 destroyed the Proton in every way. Greater dynamics, better imaging, better separation and detail. So, the LPA-1 is a clear winner as an upgrade from a receiver or a lower quality amplifier.
I live almost on the West Coast, so the $ 50 return shipping I paid, while a bit high, was worth the peace of mind for me.
Hope this helps.