i think the acoustic is unnecessary if you want to buy it just to strengthen your fingers. an electric guitar can do just that too.

as for staff... mahogany people really know how to chop you, know how to talk all kinds of shit. bently.. the fella follow you close close if you wear cheap cheap clothes and anything you want to touch they will try to stop you and go "yess can i helps you?"

but many shops also like that so..