Sorry, I can't offer you any practical advice other than Nitro RC cars are so much fun! Just can't hold them flat stick or else it fu*ks the engine was about all I was told before I got my hands on one. The 4WD ones I've used have handled fantastic, but with a heap of understeer on grass. For supreme power slides you'd have to look at a RWD truggie like you've mentioned. Definitley budget for spare steering and suspension arms and spare batteries and plenty of Nitro fuel. Nothing worse than just getting into it and the battery in the controller dies
other than smashing into a tree that jumped out in front of you