Inna, $1000 is a lot of money to me to, but trading in my Sonata for the Grado Master 2 turned out to be the right way to go for me, and I have never been so delighted.
I would try a new cartridge every other day if I had the dough, but that's not the case.
My line of reasoning was quite simple; if I liked the Sonata, I would like the Grado Master 2 even better.