Lenovo is the largest manufacturer in China of computers. A few years back they bought out IBM's PC business. All things given equal, I'd pop for the Gateway from Best Buy provided you also purchase a WALK-IN warranty. Walk-in solves a lot of problems over shipping and telephone support!
Gateways are actually fairly reliable and give an excellent value for the money. Their reputation took a beating awhile back when AMD went to Athlon and the original chipsets supporting Athlons were bogus. Everyone using AMD Athlons had those problems. It made other manufacturers (HP and Dell) gunshy about ever using AMD again.