I would get a refurb and no look back. Get going on this opportunity with the internship... Besides, I'm beginning to think that the upshot of the refresh will be just that - a minor refresh. No retina display, nothing major - except maybe a removed SuperDrive. That would be a deal breaker for a lot of us, and then refurbs will be even harder to get with the right specs.
....And this new round of rumors indicating 2 weeks makes no sense. WWDC maybe; but that's way more than 2 weeks out. Try 6 weeks, then it's 2 more before you might be able to get one that you want realistically.