D2 and 14C28N aren't terribly similar, but the general premise (to my understanding) is to have a tougher steel for the spine, and a harder one for the edge. I basically regard it as a cool-looking D2 blade. Now, eventually, you might sharpen it down to where the blade is joined, but unless you regularly try to cut highly abrasive rocks, it's probably going to outlive you with proper maintenance.
The Blur is an excellent suggestion, in S30V or Elmax. That's probably the best steel you're going to find in your price range, and the blur is just a great, solid knife, and you can deassist it if that's your preference. The Manix 2 technically has a sub-3" cutting edge because of the choil, but the overall package is that of a larger knife. I like the Lightweight iterations, but you could grab a used XL Manix if you want something bigger (but heavier).
Oh, I know you want to keep it at $100, but if you can scrape together just 5 bucks more (or find someone selling one on the exchange, maybe) you could grab a Carbon Fiber S30V Skyline, an absolutely amazing knife that I'm obsessed with.