It helps to know whether your commute is hilly & windy or flat and calm, as well as whether the roads are well maintained etc. As noted in other posts, look at Radpower for a mid-range quality bike in the $1500 range. You can convert a bike if you're handy for < $1000. IMO, don't procure a super-cheap bike from Amazon or Walmart or purchase used unless you can't afford better although some individuals have had success.