Having an Si that as you know, loves to rev, I find myself not shifting over 2300 during city driving, and I get into 5th gear as soon as I can.

So many options. Either keep the d15b vtec with Si tranny and have the 5th gear swap, or just go with the vx motor and tranny straight out. Either way, boost and juice are options, and I still wanna play mpg-whore with the car.