Tube amp Low end Bass question

I use a Subwoofer with my current system (Rogue tube preamp -2nd pre out to sub, Nuforce STA200, Zu omen defs). I listen to EVERYTHING (Rock, metal, jazz, classical, bluegrass, electro/dance, etc) and love things a bit bass heavy. Now, I also love the 3d effect of tubes for the mids (especially classic jazz recordings). I was thinking I could pair up a Tube amp like an MC275 or something similar add a second SUB and adjust accordingly. 

Is anyone doing this with great effect?