Oh and when it comes to springing for the 100 degree beasts...try before you buy, unless that sort of cash is of no consequence to you
Another point with them is that with the wider apparent FOV you can get away with fewer of them because objects can be framed as much as you want...just because you have this huge apparent FOV to look at doesn't mean to say you've got to use it
but you can frame some nice big objects with them for sure
I guess my point is...you don't have to spend the earth to have your cake. And eat it. It can be done with a few carefully chosen pieces.