I really second the rec to try touring on your symetry. In fact, my touring bike is an older steel isis (same geometry as your symetry) that I had s/s couplers installed on, and added cantilever brakes to use 32mm tires. However, the symetry as spec'd will accept 28mm wide tires, which is plenty for many touring applications, and a rear rack. So, why don't you try that, see if it limits you, and if so then consider another bike. The geometry on the older symetry/isis is not that different from the older classic/madeleine (tourers). The biggest diff. is the tourers accept wider tires and fenders and a front rack, and came stock with larger rear cogsets but you can easily put a mountain cogset and der. on your symetry if you need it (I did do this on my isis).