Hydro's feel nice but I always run mechanical's.
I ran into a nice deal at blue sky cycles,funn EZR brakes,shimano cables and all other hardware,and avid levers,for somewhere around 65 BUCKS I wanna say.I gotta say,funn might be a cheaper brand but they have worked awsome for me!!!!
About those super cheap Funn disc setup, maybe no replacement brake pads are available?
Funn EZR Mechanical Disc Brake Disc Brake System Reviews - Mtbr.com
replacement pads for Funn EZR brakes- « Singletrack Forum
Hayes Hayes So1e-MX2-MX3-GX2 Disc Brake Pads | Chain Reaction Cycles