I came looking for the same advice. I think the LHS sells shorty packs for $75.. thought I could get some cheaper, but as I look around they are either not in stock, much larger/heavier than I want, not roar approved (not sure why I care about that I don't do any large events but maybe I will) or have 5mm plugs when all my stuff is currently wired for 4mm plugs. After taxes, shipping.. etc.. looks like the packs I am looking at are not all that much cheaper than what the LHS sells.

It is for a 2wd 17.5 buggy - want high voltage, 3800-4200mah shorty pack. 4mm plugs would be ideal but converting over to 5mm would not be difficult just annoying since I just converted everything over from deans to 4mm plugs.

I prefer to buy from the LHS when it is reasonable to support them so that is how I am leaning right now, but if anyone has specific recommendations I will for sure check them out.