I would recommend to at least try QtCreator. Obviously for someone used to Visual Studio the transition won't be overnight but in the end I believe it'll be worth it.
Main reason is although you mention all developers will be using Windows, eventually you will have to run the program on other platforms during testing. And then it's hard to imagine you won't need to debug and fix things. You can do just fine with gdb/vim but for someone who's used to a debugger/editor experience that Visual Studio delivers, getting used to gdb/vim can take some time. QtCreator isn't perfect in this area, but it's as close as it gets to Visual Studio.
A few other points worth mentioning:
- It doesn't have the maturity of Visual Studio but for an IDE that's been around for around a year it's great.
- In terms of refactoring, it is not as advanced as Visual Assist X.
As far as code browsing I'd say they're equal.
