Rock Crawlers advice

[Cardnim]

Hey all,

Been loving some videos of rock crawler rc's on youTube recently and thinking about getting one myself.

I currently only have a Cat SX3 which I enjoy very much - and all the gear that goes with it (batts, electrics, decent 2.4Ghz radio etc)

Is there anyone who can recommend some stuff for me to have look at in the Crawler market which wouldnt break the bank, and might be able to reuse some of the above.

Ideally, the Crawler would use the same saddle 7.4v lipos, charger, transmitter as the Cat, and also be 1/10th scale.
Maybe that isnt possible though, as some of the high end crawlers seem to use 5 cell batteries and weird chargers?

Any advice very welcome