Question for you guys running brushless and Lipos....

[MetalMan]

Could we get some more specs?

As far as 76amps go, that number won't mean anything in a RC car. That could be the maximum continuous amp draw, or the maximum burst rate for 10seconds (you get the idea). These cars can easily pull very large amp spikes, but the batteries don't have to be specified to handle such large amp spikes. For example, my Eagle Tree MicroPower Data Recorder recorded a 97amp spike in my Rustler with a 4s 5400mah 8C/15C (43amps continuous/81amps burst) Lipo on a Feigao 540 12s motor. The cell voltage dropped to about 3.2v/cell, but the pack also was not warm (if it was, the voltage would have been higher).
The point I am getting at is that these amp draw numbers aren't all that important for car guys, but more for airplane guys.

As far as your question goes, if you have two packs in parallel, the possible amp draw rate effectively doubles, as long as the wiring/connectors can handle that.

What's the price going to be? Right now I have some cylinder-shaped LiFePO4 batteries that are better than NiMh in all areas except price and shape, but safer and more robust than Lipo (and can also charge at 2C). These are 3.2v 1200mah 16C cont. cells, and are $8.50/cell.

What are you looking for in a LVC? I could point you to the schematic of one that you could make (DIY) that could work for any voltage. What's the LVC for these cells?