I'd go with all MAN777 says. You cannot make up for a poor lens or poor technique by relying on VR/IS. Aperture/speed and lens quality is what counts. Prime versus zoom always being better.
Given that VR doesn't add much to the cost of lenses these days anyway, I can't think of a reason not to buy a new lens with it personally
Not sure what lenses you're buying!? VR/IS are noticably more expensive, drving up the cost of all long focal length primes and zooms
RR