If you can tune it or know a good shop that can tune it for you, you're fine to a certain point. That assumes you have the parts nessicary to do it.

The VTEC system of some Honda engines is really focused on N/A performance, allowing the engine to run a conservative cam profile in low RPMs to keep a good idle, drivability, and fuel economy, but run an aggressive cam profile (with more overlap) at high RPM for absolute performance. High overlap cams are not nessicary for turbo'd engines, purpose made turbo cams actually have less overlap and higher lift. There's a lot of mixed feelings around on the subject, but if it was me I'd save the money on the VTEC engine and use it to better turbo a non-VTEC.