Centrifugal blowers are ok but really require a gear change which can hurt you MPG as it is DD that may or may not be important to you. Also if you take long trips with a loud exhaust you could dislike the gear change also. You might like the blower whistle all the time or you may get tired of it.
PD- The TVS is going to offer better fuel economy over the Twin screws and less heat at closed throttle and cruising situations. (Due to TS compressing the air all the time).
Between the Whipple and Kenne Bell I've started to lean towards the Whipple simply because of the ease of maintenance. Sight glass and oil changes. They will make a lot of power with plenty of room to grow.
I'd probably go either TVS or Turbo personally.
Maybe on a 2v or a 3v, the gear ratios on the new cars are much different than previous years, the auto's are ridiculous with a 4.17 first gear, and manual's have a 3.66
No need for a gear change imo
Most auto guys that have done gear swaps end up going back down