Hello I have a Kaweco Skyline Sport. I like this pen but would like something a bit more posh. In the running are the Kaweco Al Sport in Blue (not the stonewashed version). Also the TWSBI 580al. My only demand is that the pen still looks good and is still running in 10 years (and beyond) time. I strongly suspect that the Kaweco will be still be working, but I also expect it to look like the stonewashed version by this point. I know people like a pen developing a patina. I don't. I would like it to look pretty much as I bought it. The TWSBI 580al looks really pretty. I suspect that in 10 years time it will still be looking really pretty and not as battered as the Kaweco. Will the TWSBI be still working in ten years time though. That's my dilemma. Don't know which one to buy. Any thoughts?