I only have experience with the Techtom IIC-460, I will have more info on the Import Intell. once later in the next month or so when I put it in a customer's car.
The IIC-460 has three settings for REV, and it supports full throttle shifting. I used it in all my 10 sec runs. In case you need more info on it: [ http://www.specialtyz.com/electronics.htm ]