I’ve won a cheapish HPI Nitro Evo Rush 2WD stadium truck on ebay. I chose this model because it has the easily tuneable Nitro Star T-15 engine, plus it comes with lots of extra bits including a rotastart (even though I already have one). Spares and Hop-ups for both are readily available via auction sites or online hobby shops.
I was thinking about the MT2 but couldn’t find any good examples and apart from some body strength the only difference is that its 4WD. The rush is also easier to repair due to it being less complex.
Common faults seem to be the clutch slipper pads exploding and rubbish rear shocks which cause the car to bottom out over jumps.