Hello! I live in California and dive the Monterey Bay and along the Northern Coast, so typically diving in 7mm in cold water usually. But do go to Thailand, Australia, Mexico and other warm places from time to time. I am looking for a versatile Primary Reg that would be a good balance between cold and water. I like both the B2 and 4.2 Delta but wanted to ask the more experienced what there thoughts were.

Thanks for your time!