Hi mm27,
Stampede 4x4 VXL is a great buy for an rtr. It is powerful, fast & waterproof.
As per the upgrade program, if you really want to upgrade something, then go for that TQi 4 channel Tx with 5 channel Rx w/ docking base. Good for future
Power wise it is indeed plentiful. Why it is awesome because the proportion of power, weight etc is optimum. You don't want to disturb that balance.
In future, you can look for 1/10 scale aftermarket systems as per your needs after you get a hang of this beast. But not needed as such.
It wheelies great & quite durable no doubt.