This may help...I have owned the 950/7100 and the 1050...I currently (just this week) picked up a mint 1070 and I already own a RR2150...

I think the 1070 is a bump up from the 950 and a significant bump up from the 1050...

As to your price...you are right in the wheelhouse for what I have seen...much lower is a killer price...much higher and you will be keeping it I think...

Now the RR2150...I have several 2 channel rigs to listen to and most are vintage...I have not given up on my Tube rigs...BUT...I will say this...I find the RR2150 to be a clear, articulate, clean sounding 2 channel rig that blends nicely with my Klipsch speakers(I have tried both Reference RB-5 bookshelves and extended Heritage Quartets)... it is worth it at full price and it is a killer deal at it's latest sale price...

2 channel that I also like (for comparison) Nakamichi STASIS...Yamaha Natural Sound CA610 II...EICO HF 81...NOSValves VRDs with a Juicy Music BlueBerry...

hope that helps...
Bill