[TSM330i]

I've installed quite a few hardwood floors in my house (about 900 square feet worth) and over 450 square feet on tile.

You're going to be putting down a type of hardwood flooring that isn't nailed, it's glued or snap together (you could do this yourself). The entire floor is essentially going to be a floating floor on top of the tile. It would be very expensive to rip up the tile floor and then you'll need to smooth it out and make sure it's even before you can put down the same type of floating hardwood since it's on concrete.

There have been quite a few people who are ripping up their hardwood floors in the kitchen because of water issues. You may want to look into bamboo if it's available. It's more durable for the kitchen. I have tile in my kitchen. If you opt to go with tile again, you'll have to rip up on the old floor anyway.