Hi Lucky815,
Congrats on your acceptances. I'm currently deciding on an admission offer to their Stats PhD program. I would say that the professors and program overall are fairly reputable, but the program is very new (started ~10 years ago I think, with about 8 PhDs granted so far), so it's still proving itself for the most part. The professors do research and publish frequently in reputable -journals, and there is significant collaboration with some of the other departments, such as computer science, which is fairly highly-ranked on US News. Biggest drawback is that the department is pretty small, which limits some of your study options, but if you're interested in Bayesian statistics you should be fine.
I live near Irvine currently and I grew up in Michigan, so I can compare the locales a bit. Ann Arbor is an amazing town, one of my favorites, and culture-wise is probably the closest you'll get to California in the Midwest. If you don't mind the weather, you'll probably love living there. The campus is great, and department itself is one of the top in the country. Irvine and the OC is a beautiful area with plenty to do, perfect weather, and lots of jobs and networking opportunities for statisticians. On the other hand, compared to Michigan, it's ridiculously expensive, pretty crowded, with lots of traffic.
I'm facing a similar choice between UCI PhD and NC-State PhD programs. I've visited both places, and it's still a tough choice. In the end, it comes down to your priorities and research interests, but hope this helps.