I'd stick with a classic for a few reasons.
1. It has the basic tools that let me deal with small flat screws, Phillips screws, scissors, and a knife blade that is like a scalpel plus the tweezers and toothpick. It cuts, snips, screws, plucks, probes and files. What else am I going to deal with in my day to day existence?
2. Before I got into the classic, I watched my better half torture, abuse, and misuse a classic for a few months without it exploding or imploding under extreme duress. Impressed the hell outa me.
3. I can walk into any big box spots store or Walmart anywhere in the country and walk out with a new classic for the price of a chain restaurant lunch and a beer. Can't beat that with a stick! I can't do that with any of the other harder to find 58mm's. The lowly classic is available at the amor mentioned Walmart, also Target, Academy Sports, Dicks, Bass Pro, Cabela's,
Orvis stores, and just about everywhere they sell sports/fishing gear. This means I can replace it no matter where I am, almost. The other 58mm's are much harder to find or you have to order it online.
No other SAK is as widely distributed and ubiquitous as the classic.
Now that my go-to pocket knife is the executive, my wife still carries her classic, as does my sister in law Diane, sister in law Rommeli, my brother in law Roy, cousin Scott, niece Allyssa, Niece Amanda, Friend and neighbor Howard.
It's the most produced and sold pocket knife in the world for a reason.