The only caution I'd have against sora is that some people can't manage to shift gears in the drops because of the thumb lever... If you're not planning on riding or shifting in the drops much, this doesn't matter... If you are, then you should probably check whether or not your thumb can manage this.

At below $1,000 - I'd aim for carbon seat stays (I find that it makes a huge difference on bumps or stopping hand numbness) & fork with an aluminum frame or steel frame... if you can get 105 looking at older new old stock bikes or used bikes, great. Otherwise tiagra's slightly higher end than sora and most people can shift from the drops with it.

Steel would be a heavier option & some people prefer the ride of steel - I think the jamis aurora would be in your price range, and in general jamis is supposed to have bikes that are good value for the componentry level. I think at your price range, you're unlikely to find a full carbon or titanium frame unless you luck out looking at used bikes (can be done, but sometimes takes a lot of patience)

Otherwise - I wouldn't necessarily steer you against or for any brand, just find the best fit that you can with the components you want.

Componentry for road shimano goes sora, tiagra, 105, ultegra, and dura ace. SRAM and campy also make nice components.

I know the last time I was in REI, they did have some sales going on bikes - but you may or may not have good "help" from the sales staff there on fitting.