Best Men's Shaving Razor?

I use an electric razor, so I have no clue about disposable/reusable razors for men. I'm going abroad to visit a friend, and want to give him razors and their cartridges as a gift because he's in desperate need of good-quality razors. I've heard of the Gillette Fusion and the Gillette Mach 3. Are these any good? Are there any other kinds out there that are very good? How much would razors and cartridges cost? Thanks in advance for your answers.