If you look at economics, the 250f steel chassis is the way to go, they are much more plentiful. You can use the Showa components for good feel. It isn't that difficult of a conversion. The newer 250 chassis is easy as well just not as easy to find cheap. I had an AL chassis bike and steel framed 250f, I sold the AL bike, I've since built another AL bike, not sure which I'll keep.