I would go vtec although si isn't bad...(still miss my d16z6). You're going to get a bit of noise, and ride comfort is okay. For high speed, the sol isn't really great compared to a gsr or civic. Crusin rpm with my vtec is pretty high on 5th gear, somewhere around 4, 4 1/2. Something like that. The b16 tops out pretty quickly on 3rd gear, redline is about 85mph. I could a little off but in the ballpark. Hope this helps you out a little bit.