I grew up with traditional knives and as a result I have a natural comfort level with them in terms of their functionality and use. Nail nicks don't bother me one bit...part of being a traditional knife. Not really looking for speed. But I also find moderns quite useful as well and I do like the easy opening functionality, choices of many of the newer steels, and so forth available with moderns. So, I generally carry a modern and a slip joint all the time (normal daily wear clothes).
With traditionals, my favorite pattern are Trappers. I like the two blades (use one mostly and have a sharp spare). You don't have to buy GEC. There are less costly brands. But on average, you won't find a better made factory slip joint than a GEC.
I tend to like larger slip joints and as a result, the price tends to range from $100-$130 for traditional materials with GEC or even Queen. For example, I just purchased a S&M (4.25" closed) Gunstock Jack with stag. I love the feel of this knife. But it is sort of add to the pile thing as my regular GEC carry knife is a #42. I substitute #42 for my ZT or Native 5 from time to time and carry it in a leather pocket slip. Pretty much talking the same sort of size for me whether it be modern or traditional. I almost always have a 111mm SAK in my pocket along with the other knife. It gets used the most and abused at times. I feel naked without my SAK.
My suggestion is to think in terms of carrying two knives after you make the traditional step. Keep the convenience of the modern.... go with the flow and see how you like things.