Depends on just how bulky the Mac is as to whether he'd get all his kit in a 7500. I can just about fit a 450d, 17-55, 10-20 and 10" MSI Wind in mine with a smidgeon of space for accesories in the front pouch. I could get a 70-200 in there but I'd have to leave the netbook behind.
Love the Muffin Top 7500 though, it's a joy to use!