hi sjmarano,
Even if you could compare keyboards in store, you could end up with a wrong decision. The thing is, there's usually not enough time (not to mention that you're disturbed by other customers or staff) and so it's impossible to detect important differences. For example, I tried Korg Pa5X in store (for few minutes) and it sounded like my SX700 to me -which is obviously wrong impression.
It takes days to judge the sound quality.. and that's why honest opinions from those who actually use keyboards of interest, is so important.
Being at that, I don't really trust Youtube keyboard comparisons that are made by stores.. because keep in mind: they only wish to sell what they show.
Greetings,
Bogdan