I would say that with your high level of fabrication skills that modding the Banshee geometry would be more of a WOW factor. Yes, the YFZ swaps are becoming more common and I think you will see quite a few of them next year. You won't, however, see a lot of modded Banshee based frames with upgraded suspension geometry. If I were in your position and had the tools and knowledge at my disposal, I would go for the Banshee frame and leave the YFZ alone for now. Later on if you decide you want to do something different, you know you can find a roller for next to nothing.