Ogien, there are a lot of people here recommending to you the knife they want, hope to get, or have heard great things about but haven't even held one. This is about what you want, and can afford. Keep it simple to begin with.
My first Sypderco in 92 was an Endura. Like you I was mostly used to traditional type knives. The simple lockback in a great steel is one of the easier ways to go as you can focus more not on learning new locks and such and focus on the more important things like, does it fit your hand? Is it easy to clean, maintain, and sharpen? Things like that are more important right now than what the newest steel or hottest design is going to be. That comes later.
I'd say the Full flat ground Delica in whatever color you like. It's been made better and better through redesigns and is still a best seller.
Just remember Spyderco's , at least the ones we're talking about aren't going to be the knife for you if you are going to use them for prying, as screwdrivers, throwing knives etc. They are designed for cutting and slicing , being light for the strength, and being ergonomic.
Enjoy and pick what you want. What we want for us is different and shouldn't affect your decision.
Joe