ProEFI is the closest to Motec at a cheaper cost.
The "local tuner said he tunes this and that's the reason I got it" excuse for the brand of standalone you choose is retarded. Yeah, yeah, we know you want your car tuned when you want but see the tuner who you WANT to tune your car and then ask him. I have met a tuner that doesn't tune AEM, Haltech and now since ProEFI is getting out there, they are jumping on that too.
Example, Nenni is one of the best tuners around but he has a cost and tunes pretty much anything, AEM for sure. Don't let "flying in a tuner cost money" get to you as a lot of big name guys will go to a shop and tune at a flat cost for certain cars.
Example, Alpha has been up here May, June and now August and he has been booked up every time. Get the tuner you want but you can't go wrong with AEM, everyone and their grandmas know it. The newest software is so simple, it's unbelievable.