Getting better, probably would stick with the 32s most likely but not sure on those. I wouldn't go bladed spokes or straight pull which I am guessing those Shimano wheels might be because should you need a spoke it is probably not something most shops will have. I don't know if proprietary but possibly (again not sure of exact wheel and can't check specs or remember most of their system wheels anyway). For commuting reliability and serviceability are key factors. Yes you are pretty light at least compared to me you are a feather but still wouldn't want to be struck down using a lightweight wheel especially if not racing. Some tarmac and paved trails can be quite nasty sometimes and your level of commuting is significant so yeah I would say go with 32 or at least 28h wheels. I would also ditch the backpack get some air moving on that back and be more comfortable in all aspects.