If you stop and think about it, how many RTR MT's are there that you wouldn't seriously consider replacing the engine in? The only one I can think of is the EK4. The T-Maxx has the stalling issues with the 2.5, the Savage is severely underpowered, the Terra Crusher is severely underpowered, the list goes on and on. My point is, it would be silly to base the purchase of an MT soley on its engine. You've got to look at the whole package. As a total package the Maxx and the Savage are 2 MT's that are tough to beat, despite their engine issues. Both are tough, both handle well, and both have a plethora of parts available for them. My advise, buy a Maxx and replace the 2.5 with a Sirio .18 or Fantom FR18, or buy a Savage and replace its .21 with a Picco .26 and be done with the engine worries.