Keyboard tray suggestions?

[hnq]

I work as a software developer - so I'm on a keyboard 10 + hours a day. I'm looking to buy a professional quality keyboard tray. I had been working with the keyboard in my lap and that is no longer comfortable. Does anyone have any tips or recommendations?

I think that I definitely need a negative tilt and a mouse platform that has independent tilt. Should I go for a Sit - Stand tray?

the only challenge is that my desk is pretty small - the areas where the keyboard tray would go is only 16 inches deep x 20 inches wide.

I've looked at the Humanscale and 3M trays but haven't been able to find any reviews or opinions about them...

Thanks!