http://www.cygnusgroup.ca/
I'm not sure what your budget is but I have used these guys before and they have some great products.
Your idea is simple which is good. Make sure to do manual updates for everything or your beautiful display will be interrupted with a disclaimer asking if you want to update... very minor but looks a little unprofessional.
Also a webpage has one flaw, it requires the internet. If for some reason the internet isn't working, either is your kiosk.