Apple has tweaked its MacBook Pro line with faster processors and more robust video chips. The 13-inch model costing US$1,199 now packs a 2.4GHz dual-core Intel Core i5 processor and a 500GB, 5400RPM hard drive. Moreover, the $1,499 model comes with a 2.8GHz Core i7 and a 750GB, 5400RPM hard drive. Similarly, the 15-inch MacBook