If you start from Philadelphia City Hall, it takes less than 10 minutes to cross the Delaware River (traffic permitting - which isn't that bad if you avoid the rush hours) into South New Jerey, by car via one of the 4 main bridges or by PATCO train then bus. The locals usually cross the river to South Jersey to do their shopping too. There's a huge number of malls - Cherry Hill, Echelon, Moorestown, Deptford to name but 4. The latest addition is the Promenade Shopping Center in Marlton, NJ. Besides the mandatory Banana Republic, J Crew, Hugo Boss and Benetton, a must for a lot of musically inclined Brits would be the Apple Store where you can get iPod related goods/accessories galore. There is a Bose store nearby as well. Hearty soups served in sourdough bread bowls at Panera Bread should nourish most shopping weary visitors.