Re: Turbo flex or another brand bit stuck.
Greetings Andre-
Before you decide a line array is the format for your applications, I strongly suggest you learn how to physically measure the audience areas you need to cover, then use manufacturer's coverage prediction software to see what a given system will actually do. You will find that to provide reasonably even tonal coverage over both distance and height will require LOTS more speakers than you might presume.
The Turbo Flex is a nice speaker system, but it's not got the output of VTX or the RCF TT55 I think you need to do the predictions to see just how much difference there will be. Simply adding more speakers to the line will not make it louder (not of the order of 10dB, anyway), although you'll gain more directivity at increasingly lower frequencies as the line length increases and will allow you to cover taller venues (upper bowl of an arena, top balcony of a theater, etc.
If you are doing electronic dance events you will need a significant investment in subwoofers, too, possibly as much as you'll spend on tops for the same event. EDM requires both loud and low, which means "big _and_ expensive."
Good luck, Andre.