I had a Rogue RP-7 and in my system , while the soundstage was quite wide, I didn't get a lot of depth. I've had 2 other preamps in my system since then and I think both best it in terms of depth of soundstage and overall tone. The first thing I tried was a don Sachs Model 2. You could get one on the used market for about 2k probably. Alternatively, the guy that designed it at tubes4hifi will build you one to pretty much the same spec as don. That unit showed me depth of soundstage like I'd never heard. Also, for me, the 6SN7 tubes just have the sound I'm looking for from a tubed preamp.the issue I had with that unit is that there's no balance on it and I listen to a mostly vinyl. Old records are some times not worn evenly and sometimes I need to adjust balance to keep image centered.
What I have in my system now is a ModWright ls100 and I'm extremely happy with it. I like the look and knob feel but most of all what I like is the sound of it. It has the same richness and depth that the Sachs had (also 6sn7 based) but now I have balance control. This is gonna be in my system for a while now.