used to be the south east technical engineer for toad/sigma/datatool when toad were actually toad, but they are now owned by scorpion.

i would recommend the toad ai606t2, but i havent seen the new ones since the changeover, ive heard that theyve respecced the looms on them to a thinner gauge and thin wall cable, not that its an issue as the alarm itself only pulls 2a but the immobiliser circuit is still decent gauge cable.

make sure that you dont cheat with the immobilisers, ive seen too many cutting the ignition circuit at the column and they melt due to running in excess of 45amps throught the immobiliser circuit.

im sure being an installer youll do a dcecent job, especially as its your own car, but fuel pump and starter cut or coil is the cuts to go for.

the ai606 used to be very expandable and could do as mauch as the clifford range including remote start, total closure, prox warning etc but never had the same amount of siren chirps etc.

WITH ALL ALARMS ITS NOT THE PRODUCT THAT MAKES IT BUT THE QUALITY OF INSTALLATION.