I have heard that they are reliability nightmares and that service is unbelievably expensive (out of warranty).

I considered an SRT10 also, although a regular cab.

A lot of power, but a lot of weight too. 500 HP, but also around 5,000 pounds. The power to weight ratio is actually about the same as an SRT6 Coupe.

I still like the SRT10 though, just not sure if I would buy one.
Good luck in whatever you decide.