While I do consider the VSonic and HiFiMan to be upgrades over those two, you may be surprised how close the Sony/LG already are to the good $100-200 earphones. Anyway, you should expect something along these lines:
RE-400: good if you like the clarity and more neutral tone of the Quadbeat over the warmer, fuller sound of the MH1C. It won't have the bass depth of the Sony or the soundstage width of the LG, but it makes up for it with a balanced and neutral presentation, treble smoothness, and very clean bass.
GR07BE: bassier than the RE-400 but also has more prominent treble a-la Quadbeat. Wider presentation than the RE-400 but the top end is not as smooth.
Hmmm... While i do love the energetic quadbeat and a little eqing gets me to a completely comfortable bass levels, but the truth is i end up keeping MH1c more in the ears than the LG, so now building up from here, i find MH1C a touch warm, so does something comes off your mind which retains the fatigue free character of the MH1c but improves upon clarity? I love the thump though...