Your degree is more important than having a bunch of time in class B airspace. Seriously, it's all the same anyway. Instruct for the school your attending now. You'll graduate with a ton of time and spend less time trying to find flight schools to work at making even less than you do at the regionals. Another big perk is that many universities will have healthcare and other bennefits. In addition to this, you may have some sort of reduction in tuition since you're an employee of the school. Not a bad deal.