For 8 miles per day you're going to want to something light and if you don't want wet feet at the other end then Gore Tex too.
I'd recommend "Salomon" for everyday hiking as they are a good balance between performance and cost.
I hiked 62 miles in a day (for Charity) wearing Salomon shoes and was very impressed and they went on to last me a couple of years walking a couple of miles per day. If well looked after I would imagine a year of usage would be possible.
I was a Royal Marine nearly twenty years ago and we only had the old school leather boots which took ages to break in, whereas most modern shoes take very little time to feel comfortable, so hopefully once you find a style that suits you, replacing them won't be a big deal.
My recommendation is to look at "Approach shoes", boots are likely overkill, but go provide better protection from rain and puddles etc.
Gore-tex does mildly impact the breathe-ability of the shoes, but worth it in my opinion.
I'd also recommend carrying some Zinc oxide tape in case you get some hot spots, also get some decent socks and keep a spare dry pair at work.
Last thing to mention is that keeping a change of shoes at work will be much more comfortable that wearing the same shoes all day (sorry if that's too obvious).