Russ:
I wouldn't use the RSP1. It's better than the cheap 8 bit dongles but miles short of the Perseus, HF+ and Elad offerings.
The RSP1A is better and might suffice for some DXers but still is not top of the line.
The SDRUno software is fairly nice.
The chief advantage if the RSPs is price. However, the HF+ is just a little more and is the best receiver out there in my mind. If it recorded the whole MW band and had a recording scheduler, it would have no serious holes.
Chuck
http://www.hard-core-dx.com/article.php?story=20190111011504479