I played around with a Motec at the speedshop when they tune their racecar, but it costs as much as my car is worth! That is the only one I have played with. I considered the AEM but it too is more limited than the EEC V system. A tweecer is the way to go as far as I am concerned.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black