ivobj
Contributor
Used all except the A700, they are all great, it is difficult to say one is better then the other, maybe the only diference would be if you have preference between diaphragm and piston, MK25 is a balanced piston, all the others are diaphragm. I use the XTX200 in my singles setup, MK25/S600 in my doubles (or MK17 in cold water) and MK17/S555 for deco bottles.
