Dual Band Wireless N Access Point

[Zico]

I'm looking to upgrade from my old 3Com 54G access point to a dual band wireless N access point.

Current setup as follows:

Sky Netgear DG834GT >>> 3Com Gigabit Switch >>> 3Com 11G Access Point >>> 2x laptops with Intel 5300 wireless cards and 3 aerials fitted.

Any recommendations???