Just wanted to get back to you guys and say that I did go through with the Compact purchase and I am quite pleased. I took a bit of a gamble ordering it as I live in Vancouver, Canada so the price was significant. However, I have no regrets. I have owned numerous cabs and I have found that usually portability comes at a cost. I used quite a few schroeders (1212r, 1210r, 1515L, 1212bmf and others) and felt I was always compromising my tone for portability. Not so with the Compact! And its even easier, more portable to move than the schroes. The amps I currently have that I have used with the Compact include the LMII, GK mb500 and markbass cmd121p 112 combo. They all sound good, but I like the tone of the LMII best. The mb500 is seemingly somewhat louder at 350w at 8 ohms. From my experiences the LMII compresses at 8 ohms when pushed. However, when adding the tech 21 VT Bass this rig just sounds amazing. Full and round yet still punchy. My main rig now is the markbass cmd121p + vt bass + Compact and I get lots of volume. Its also very portable as I have just two units to carry (I stick all cables, pedals in the back of the markbass cmd121p). Also, I love the height I get when I add the markbass cmd121p. The markbass cmd121p does have its limitations but these two cabs together is all the volume I'll ever need. For super loud gigs where I have no PA support and have to fill the dance floor with bass, I will use the Compact with my LDS 15/6 and I am sure that will be quite good.
My only wish now is that Eminence would make a 4 ohm 3015HO driver... although I guess that would mean I couldnt use the markbass cmd121p with it.