Benji you can honestly put together a few a la cart orders for not much more than an entire kit
you can go to liberty flights and order a front charge usb EGO bat (25 bucks)
and then volcano and do the same thing (I think it is like 24 bucks with cone)
and all the equipment works for both (if you already have enough 510 attys its even cheaper if not pick up one from either or both vendors)
That is exactly what I should do!
I was in the state of mind that I should be ordering a "kit" from a vendor but ordering parts & pieces is the best avenue to see what styles I like. Plus if I want more I'll know which I like.
650, 750, 900, or higher batteries is the next question. What's the drain time on those batteries?