Answer: It all depends. No one system is clearly "better" technically and cost-wise IMO. It's a network thing. You need to know what your neighbor hams are adopting and (probably) go with that. If you're the first in your area, you won't have anyone to talk to! At minimum, you need at least one active repeater in your area.
Actually, the incompatibility of VHF digital systems is a pretty good reason to stick with tried and true analog FM, and save your cash until the dust settles, if it ever does. In many areas, VHF activity is rather low. It's a shame if the relatively small number of active users is split up into incompatible "walled gardens".
On the other hand, a digital system linked through the internet can open up the whole world to your handheld device. Your choice!