I had the RP-5 for about 10 months and later traded it in on a PS Audio BHK Pre. Just some of my observations:
1. You had to (maybe it has changed since) to take entire back cover off to access tubes. The BHK has a small lid on top with two screws holding in place over tube area.
2. My copy had some noise /hiss issues. I even changed tubes...still there. Plus the screen went blank. Both fixed under warranty...a big pain to ship.
3. Sounded more SS than tube with stock JJ tubes. The BHK has a smoothness to the mids and highs with stock PSvanes. I switched to Gold Lions.
4. Nice remote
5. Mono button (I wish the BHK had one)
6. The RP-5 Includes a basic phono (I never tried) or you can switch it to a regular input
Overall, the fit and finish of the BHK is superior IMO and the sound is much more refined. Plus, later on I decided I wanted Balanced which the RP-7 DOES have.
The RP-5 was a fine unit, just the warranty issue, tube access, etc made it more frustrating. Most owners love the RP series Pre’s. Above was was just my experience. I wanted, at one time, wanted to try a Stereo 100 amp. I realize things do happen from time to time and Rogue has top notch customer service.