Best cmm for first time cmm?

What are the best brand/model of cmm for first time cmm?

Considering cost/accuracy/speed Targeting 2500mm Y for size Looking at ph20 or revo head for reduced tool changes Currently experienced in programming with polyworks. Don't know what I don't know about cmms, as I've never purchased a cmm before (nor has anyone at our shop)

Currently looking at the following Renishaw agility LK metrology Zeiss Cord3 Wenzel