Reply to Mixtrack with TP2 LPD8 + mpd26 or mpd32?

I am believeing on getting some midi controllers for my mixtrack and traktor pro 2 set up. Im running a macbook pro 13" 2011 with OSX lion too.

My question is can i map 2 extra controllers lpd8 and mpd26 to work with my current set up to control fx banks, samples banks and other parameters in tp2?

or can i just get the bigger mpd32 to save space and cash. but i heard something about mpd32 having problems with lion is this true?

please help out, need some advise before dishing out $$ on controllers that i might not be able to use coz of compatibility.

Please

Thank you in advance