Just got the pt100. It sounds great with my st70 Only thing I don't love is the remote control and how you go about changing FM stations and scanning. It could have been better thought out I think. But to be honest I pretty much only use FM for listening to npr so I don't have to change the station much.
I noticed an immediate improvement in bass reponse. I don't know if my other peeps were just in disrepair or what, but I was surprised to hear from my pioneer bs22 speakers that I had not ever heard before. I found the was a considerable improvement in center stereo image a well. The speakers, they just seemed to sound more cohesive.
I had been using a Yamaha c70 which had some issues, and then switched to an Onkyo A-5 integrated, using just the preamp section. The Onkyo while great looking was OK sounding, but something about it I was just never quite happy with.
I found the emotiva just sounds very very nice to me. I would recommend for sure, they have a 30 trial period so, definitely worth trying out. I ordered mine on a Sunday and it arrived on a Thursday. I got mine during their holiday sale at 254 shipped. Hard to beat the price, I would say the current 299 is still a very fair price.