Don't under estimate the 6, I bought one as an interim device, but honestly it works so well, I passed on the 12 when my name was called (not to rub that in lol) because the 6 is so powerful. I thought the 6 was just better than nothing, 100% I needed the 12, but with the way you can change layout screens on the fly, have dedicated buttons take you to other layouts etc, I found I just don't need the 12.
For example, I thought the 6 was going to be way too few switches. I thought I needed at 2 for bank up down, and I'd want to have scenes etc, with everything readily available, so naturally needed like 12 switches. BUT the 6 (and the 12 too) is so cleverly thought out that you can hit one button, and enter the preset select layout, which then can have a bank size 6 presets, and you can tell it to automatically change layout back to your scene or effects etc layout after you select a preset, so you don't really need the presets dedicated to certain buttons as they automatically can change back, letting you do a lot more with far few switches than you'd imagine. Plus you can do things like have per preset switches so each patch has the specific controls you want/need, and you don't need to have a whole layout of each and every effect, with most of them not loaded. You just have the switches for the effects that specific preset has, which also works really brilliantly.
Not knocking the 12, I'm sure it get, but the 6 does so much, so well, and its cheaper and saves a lot of space on a stage. Plus, it might be far easier to get sooner, so don't automatically write it off. As I said, I thought it was a stop gap, but ended up being all the more I need