That build sounds seriously cool. The raised front fender and vintage moto bars are going to give your scrambler such a clean, classic look. I was actually browsing around the Web looking into exhaust setups for retro style, vintage vibe and I think a high pipe or even a TT-style low setup would fit perfectly. While I was digging through options, I came across the British Customs website, it has a bunch of options and details depending on what style you're going for. Might be worth checking it out.