Here's a reasonable place to start for food.
Diner
If you are looking for location - I'd stay out of Downtown Portland. The Pearl / NW portland is much better if you like food and walking places.
Northrup Station has a hipster vibe but is clean and in a good location. If you want a splurge meal, (one of) the best places in Portland is right next door. Paley's Place.
You can walk to Powells Book store about a mile away or hop on the streetcar.
A little nicer lodging is at the just completed Residence Inn in the Pearl (not the one on the Waterfront - that needs a facelift) - don't be fooled by the name, they did a good job.
If you do want downtown, the best place I think is "The Nines" hotel;. Very pricey, but sometimes you can find a deal. Unfortunately you have to wade through Portland's Army of homeless/dirtbags to enter the place.
Downtown is kind of lost to that crew.
There are lots of cool things to see in July- there is a great Blues Festival on the Waterfront over the 4th. If you can handle sweaty drunk people, it is a good time in a inice venuie
Or, head to Central Oregon (my home) for the Real Oregon
Bend
We've got fancy restaurants, biking, fishing, hiking and about 30 breweries without the big city issues