With more money spent on speakers you should get better more rigid enclosures, higher priced more accurate drivers and usually (but sadly not always) a well though out design.
You will gain clarity in the top range and control in the bottom end, plus it should go lower.
When I switched from speakers I was familiar with to new ones that cost around 5-6X as much, aside from the treble clarity I noticed a surprising lack of bass overhang - the deep bass notes didn't continue for a fraction of a second afterward, they simply stopped dead and going back to the olde speakers it seemed that that bass overhang resulted in a smearing, if you will, of the music and a loss of clarity. It was like listening to a bad in your garage vs. in a hall with designed acoustic space.
And a far as the Ferraris go, I wish I still owned my vintage Lamborghini, which was a hoot and a half, but which you didn't want to park and leave anywhere lest you come back to find it with someone's initials scratched into it.