[vxNsr]

If you do dev for iOS, then you need a Mac, no two ways about it. doing iOS dev on windows is really cumbersome and near impossible, if you're willing to shell out the money get the best mac you can.

I usually recommend Windows because of price-convenience ratio, (meaning that most people don't need the premium offerings of a mac and will be perfectly satisfied with a $400 windows machine). But if your use case forces mac AND you're used to it AND you have the money to spend -- then by all means go for mac.

In terms of specs Mac is only slightly more expensive, so if you need/want those specs once again it makes sense to stick with mac.