I was guided to buy an RX7 as my first race car due to the fact it's cheap, it runs, and will continue to run. Why you ask? I know you would.
Since us RX7 folks don't get to play with our engine, you also get to save mucho bucks on not playing with your engine. Think of these Honda guys who are spending $7000 on theirs. Ouch! The rotary engine is also a little more forgiving if you miss a shift and zing it a couple times. Some piston engines will let you do that once and that's all she wrote.
One thing to know though is be sure you know how to care for and feed these rotary engines. This was something I was lacking on and because of it went through an engine. The engine needs oil in the fuel. Who knew! And to save them brakes, on your cool down lap, COOL DOWN! Don't even touch them! Then when you park, wait 5 minutes and push the car forward a couple feet to let a different part of the pads bake the rotors for awhile. Repeat in another 5.
Oh, and another thing that's good to know. When I needed another engine, I got one from a yard for $450. I put it in, it ran, I raced. That's all the prep it needed. That's got to be one of the easiest engine swaps of all time.
Plus if you race a 7, you get to meet those people who come up to you at the pump on the way to the track and say "rotary, what's a rotary?".
Oh, and don't flood it.
Rock and roll!
Ben.