Im currently running Revo 4 for over a year now and love it, not gone 4+ yet as I find 4 fine as its just a weekend toy
Driven other maps and they were good also, even had Jamsport 400 map and it felt good and aggressive but the Revo brings in power smoother for my driving style so I find it suits me better, plus I had opportunity for more local support which was probably my main reason for switch. Also been out in a JWR car and it ran very well also so there are options.
For me Revo 4 puts a smile on my face, power when wanted as soon as I switch on the car.
I have uprated exhaust, manifold, injectors, intercooler, breather so you will need all the bits, once I went 4 I also uprated brakes as the standards are ok but did start to make me nervous