With DSLR's, get decent glass over a new body. Sensor and focus selection technology evolves so fast that cutting edge today is out of date in two years time. At the moment, even the basic consumer DSLR has more functions and higher pixel count than pro cameras from 5 years ago. Not that that is alwys a good thing, as theres more to life than MP bragging rights
Decent glass will hold its value much better and once you have the best, be that either outright best, or the best for your budget, it will serve you well for years to come. Theres no poing putting an average or poor lens onto an expensive body as the resulting picture will only be as good as the lens that's gathering the light and focussing it onto the sensor.