CU Boulder has 75 faculty members that participate in some aspect of neuroscience too, see this website,
so Boulder seems to have plenty of graduate classes too. I think the medical school neuroscience program may be more established as I understand it, but
Boulder is right up there, with a PhD program and undergraduate programs offered. So this means lots of research work in Boulder if you do not want to commute to Aurora. I still think the Aurora Medical school lab option is worth looking into, for summer research work.