Should I buy a Sansamp unit for bass or wait for a VST plugin?

I own both a PSA-1 and an RBI and for some reason it's easier to get a great bass tone out of the RBI, just my two cents worth. However the PSA-1 is more useable in other situations. I am glad I own the unit over the plugin. If it's near the desk it's an easy unit to tweak cause of the hands on knobs, not digital paramter editing.