I'm gathering parts and tools to rebuild my 2009 track bike that I crashed (in a spectacular way :surprise at Barber last year. Amongst other things, my cheapo Yoshio slip-on got dented up and I'm looking for something new. I would prefer a full system, as this is a track only bike, but I can't find much out there now. I don't want to spend a lot as I need lotsa other things too... Akrapovic is either sold out or expensive, depending on where I check. The Yoshimura is affordable, but won't fit with my Armour race fairings, and they are very heavy anyway. Giannelli have a system for $850.. do anybody have experience with these? I know they are a sister brand of Arrow, but they are half price, so I'm a little skeptical. Do anybody have experience with Giannelli? What other systems are available for a decent price? Must not be terribly loud nor heavy!