RE: Too many choices--need advice.
Just one comment - if you are going to move up to 370 and 400 motors your best bet for an ESC is the Castle Creations Pixie 20P, the 35 would really be overkill, but the 20P is pretty light (mine's 12g with wires and Gold Connectors) and is what you'll need to cope with the 10-12A your 400 may draw. The advantage of the Pixie (and the Pegasus) over other brands is that they are programmable for LVC so you'll be good to go with LiPoly if need be.
Cheers, Phil