Hi DCarol,
Warning - dealer disclaimer.
When I read a post like yours, the questions that immediately that come to mind are - what is the poster after, and what is the weak link in his signal chain?
With all due respect to the posters above, I beg to differ. They have given you excellent advice about cartridges - what you WANT, but not what you NEED ... methinks.
If the cartridge is not worn out, I would keep it and look to your turntable and tonearm. The XV-1s is not the weak link in your signal chain.
While it's true that you might be getting tired of the XV1s, this has more to do with your turntable and tonearm than with your cartridge.
None of this is to say that there aren't other wonderful cartridges out there, and the A-90 certainly is one of them.
Notice the comments about the others being better "by a small margin". In my experience, I've found setup inconsistencies to easily cover these small margins.
You have bigger gains to make, and especially for your budget allocation.
If you happen to make it to the Audiofest this October, we'll be highlighting the XV1s and the A-90 on our turntables. You'll really hear both of these fine cartridges strut their stuff.
Cheers,
Thom @ Galibier