Any kind of table that doesn't have too much desk space that is going to reflect the speakers signals back into your ears.
Something simple and tall enough for you.
http://www.ikea.com/us/en/catalog/products/S49932670/To raise speakers to ear height on the cheap - bricks or concrete blocks.
http://www.homedepot.com/b/Building-Materials-Concrete-Cement-Masonry-Concrete-Blocks-Bricks/N-5yc1vZbogeYou can even put a towel or rubber mat under and on them to keep them stable and isolated.
Prefab desks with speaker placement shelves are a waste as they're never quite the right height, and also they aren't adjustable.
Need a rack mount too?
http://www.instructables.com/id/8U-Rack-Case-From-IKEA-RAST-Table/Spend the money on something like auralex room treatment kits and get a better monitoring environment.
Keyboard Stand - get one of these:
http://www.musiciansfriend.com/accessories/on-stage-stands-standard-keyboard-standEven better, find one on local craigslist, or classifieds.
If you're earning well from your music, then start investing it into 'stuff'.
As Dioltas mentioned those speaker stands I have in a professional studio, good thing about those and a thin width desk is placement options and height options for the speakers.