Remember that cities are more expensive to live in than suburbs. That extra 10% might just be cost of living adjustment. You have to figure out what your expenses are currently, as well as what your estimated expenses will be in the new location, before you really know that you will be getting an extra 10% salary or whatever.
Yeah, but if you live in a real city with good public transport and a thriving commercial/residential core you can get by without a car and all of the associated costs. I live in Manhattan and though it is more expensive than elsewhere the pay differential and the money saved on cars makes it a pretty good proposition. (For me, anyway; degustibus non est disputantum and so forth.)
