I just started back to touring cars after 5 years and use the Mamba Max Pro set in blinky mode. It had as much rip and top end as any of the better guys but they just have a better overall setup and drive better with that setup but punch, speed and topend is not what I'm lacking.
Plus this speedo has room to grow with you and is capable of running in any class you decide to race because it has every feature from blinky, to boost, to torque control and so on. Price they can be found for under 120 bucks. I didn't have any problems getting it in my new VBC Wildfire.