Look up Niel for sure, at least online if not in person. He's very sharp!
For me, less wires is always good, but others value the lowest possible cost per watthour. Depends on what floats your boat.
4, 6s, 5000 mha packs plus Icecube 57's charging harnesses, plus a 350w meanwell power supply, plus a 300w RC charger makes a great way to get started with hobby king RC lipo.
44-50v 10ah, easy to swap between charging and running, and fits nice on any bike. Call it 12 mile range at full speed. Easy to add 5 ah more and have 18 mile range.
Monitoring the pack is another story. I do fine with a Cyclanalyst monitoring just the pack voltage, because I don't try to get the full 100% discharge.
That is, however, a verrrry interesting 2s 12ah pack. I've been saying they should make something like that, for those who are piling up more than 1 kwh of capacity, and bulk charging at all kinds of odd voltages above 72v.
About 15 of those would be fun.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.