I roll with vintage ten speed rubber grips, the four piece tube style. I had them on my touring bike 25 years ago, I used them for five years on that bike until I sold the bike. When I bought my current issue bike, I bought a old BSO just because it had those grips. I don't think that they make them (the grips) any more. I bought another set on ebay for my next bike.
They are comfortable, and they wear like iron. The set I have on my bike have been on there for over two years now, I am not sure how long they were on the other bike (aka BSO).
If I couldn't have them, I probably would go for gel under leather for comfort. I don't believe that the leather over gel would be as durable.