Having used 2, 3, 4, and 5 blade carts, I prefer the 2 blade carts, as I only have one blade dry shaving me per pass, instead of 2,3, or 4.
My favorite carts are the Sensor and Atra.
That said, nothing can compare to the shave you get with a good DE/SE/Injector, except for a really good straight.
The EJ DE87 is a fantastic shaver, and with a Feather blade it's on a whole different plane.
The Merkur slant is another amazing piece of kit. Very easy to get all day BBS with it, even with cheap dollar store blades.
The Gem 1912 and Micromatic are the next best thing to a straight. The thicker blades give a better shave, and with fewer passes. Once you use one, you wonder why they quit making them. They're that good.