What to do next?

[skellyo]

I have just set up a deal to sell my Slash as a roller. Now I'll have a MMM, Medusa 36-60-2000 and 2 - 4S 25C 3700mAh lipos that will be sitting here. I'm trying to figure out what to do next. I already have the following vehicles:

CRT-MMM-1515/1Y
CR-MMM-1512/2D
CR-MMM-Castle 2200kv
E-Maxx-MMM-1515/1Y
Savage Flux
Summit
RC18T-Mamba-Aon4900

So what do I buy to put the MMM/Medusa/4S 3700's in? I was thinking about another buggy, but I think 2 is enough already. I also have the ability to move around any of the other systems so, for instance, I can go with another truggy/MT and move the Castle 2200kv out of the CR in lieu of the Medusa.

Any thoughts?