Pitch shift entire track

From time to time I need to pitch shift or time stretch an entire track, or song.

Are there any high quality plug ins out there?

I used to use Acid, but I did not renew my licence after moving to XP. Plus, I didn't like having to export to Acid, then back to Sonar.

The Sonar Groove clip feature seems to have a size limitation, and I keep getting an error message.

The Sonar plug in is weak.

Any thoughts?

Thanks