If you like sticks, I use a sanwa exzes X and it's been a fantastic radio. Tons of functions, really comfortable and I really feel connected with the car. Downside is receivers are a little pricey!
As for servos, there are many to choose from. Xpert get rave reviews but I've been using a trusty old ace ds 1015 for a couple of years without any issues racing in all sorts of weather.
I found the mbx7 to be a nice step up from my old 6. Hope you have lots of fun with it!