well i have a mk1 brahma 15", i havent heard a mk2 but i wouldn't think their is much of a difference...the mk2 is supposed to give of a little more spl...but not a whole lot more...like the mk1 has an oneway xmax of 28(i think) and the mk2 has a oneway xmax of 29(i think)...not to different...id go with whatever would be cheaper...but thats comin from a high schooler with no money...lol