http://www.amazon.com/Hercules-BS100B-WIRE-Music-Stand/dp/B000BGX5TG

I have this one, and I love it! Very heavy duty for a portable stand and feels very stable. Also, it adusts taller than most stands so, for me at least (I'm very tall) it's much more comfortable to read from if I'm standing but is still adjusts to a great height when sitting.