which mover??

im currently in the process of trying to decide which caravan mover i should purchase and I have narrowed the choice to either  a powertouch or an e-go or purpleline model........are all movers much the same or is it a case of the more you spend the better??

I have to say i was swaying towards the Powertouch models simply because of the five year guarantee and the good service they seem to provide but the e-go and purple line supplied and fitted by autofix seem to be on a par??

any help or advice will be most gratefully recieved

many thanks