Er, speaking of retail chains, if you're coming in part to do the shopping thing, the major chains (anywhere in the Northeast) to watch for electronics are: Staples, OfficeMax, Office Depot; Best Buy, Circuit City, CompUSA, and J&R (J&R is specific to NYC); and maybe Target, Wal-Mart, and K-Mart.
We don't have Fry's on this side of the country, unfortunately.
All of those but Wal-Mart have weekly sales with particular monitors, disks, whole systems, etc. at cutthroat prices.
The retail trinity of Target, Wal-Mart, and K-Mart might be worth it if you need anything for a console, (K-Mart often has dusty stock of last year's console titles marked $10-$20 cheaper than elsewhere, since nobody goes there for games)... of course, with the exchange rate you might just want to hit a Gamestop or similar specialist chain.
Note that DVI, HDMI, and even boring USB cables are mindbendingly expensive at all major chains, it's how they make up for some of the loss-leading.