the mp2 has a much different sound thant he V2....it definitely throws that "warm blankt" over the sound as some here have described it...the Mod SBM1 has a similar effect, but not to the level of the MP2....now if you want some really dark and punchy recordings, the MP2 and MOd SBM1 combo is fantastic!
To your original question, I still have my MP2/Mod SBM1 and a V3, mainly for stealthing, but also because I intended some nights to run those either with the V3 or without the V3, but in running without the V3, I would lose the incredible detail that I am getting with it right now...a significant step up from the MP2/MOd SBM1...but due to that detail sometimes you hear the "echo effect" of a venue better than you did while you were there...which can be frustrating...my next test is to run the V3 as a pre and the mod sbm as the A/D for a set 1 vs 2 type thing to see the effect...
rambling email, hope it is somewhat helpful