FWIW When selecting a commuter bike the biggest source of heartache can be chains and derailleurs. When I worked at a bike shop and later a Co-Op it seemed that every single problems went back to a derailleur adjustment, a bent derailleur hanger in some way or another. My advice echos GamblerGORD53 Something with an internal gear hub. I won't go so far as drum brakes...he is alone in that regard, as practical as they may really legitimately be, the cost of building wheels essentially from scratch is a surprisingly expensive proposition. You can always save that expense for the future, if & when you decide you'd like to do so. Instead, I'd look towards Linus or Public or Momentum and their 7 or 8 speed internal gear hubbed models. Significantly less maintenance for more or less the same cost as a model with a cheap and problem prone bottom tier derailleur. And you don't have to worry about it getting damaged in the bike rack or all the hassle of a bike shop repair, special order hanger, damaged wheel with ripped out spikes, etc...

I have a Public 8i Dutch style (apparently they only come in 7 speed now) and a Rohloff travel all-road disc bike. Neither has cost me much of anything beyond a $50 annual service/oil change. I have no problem spending stupid money on bikes. But for a 5 mile daily commuter the Public, Linus or Momentum IGH is a no-brainer.