Bourg AE System vs. BT System

I am considering buying a Bourg AE30 collator with stitcher trimmer and folder, but wanted to hear some thoughts on the difference between the bourg tower systems like the BT15.

Which do you prefer?
I need to run some coated stock so I would by using the air assist.
Thanks

 

Did you make your decision? The AE units seem to go pretty cheap for a while now used compared to the towers... just starting to see the towers come on the market used at a good price, and that would save a ton of space. Not sure about conveniences lost like the old quick-shift double-load of the horizontal collators (without having to pay for the extra bins for spares.)