You're going to be limited to about 6000-6200 with a hydraulic roller cam, but you can still make it fun. Using the factory adjustables is do-able, but it will take a little more thought to get the correct pushrod length for preload.
Something in the 230-236 degree range would be good for you, match the lift to the heads, and a 108 LSA would give you the sound that you want. I'm not a Thumpr fan, but there are other ways of getting there.