Vandersteen 5a's - an upgrade from Vienna mahlers?

I have Vienna mahlers and have tried a few tube amps without success. I am thinking of the 5a's as I like the idea of SS powered bass and vandersteen's no fatiguing detailed sound. This will enable me to use a nice tube amp
I like mostly rock/alternative/pop/electronic type music with some blues and jazz.

Will the vandersteen be a positive step or just a sideways step.