Reply to X-Session Pro VS Hercules RMX/Steel

hi guys,

who have or had an x-session pro & a hercules steel/Rmx ?
i'm looking for a good cheap controller, my choices go to the x-session pro or the steel...(no need of internal soundcard)...

i know the steel has more controls & is in metal but it's not my essential desire...quality of the knobs is more important to my eyes, are they solid ?

Someone could tell me, which is the best (quality of the knobs, faders, buttons...) ?