welcome. Anything under $1000, u're looking at Chinese made bikes. I don't see what's wrong with them unless you don't like Chinese. How can one not like the people who gave us Dim Sum and Firecrackers?!
Anyhoo, each company that source parts from China has its own QC standards. Now which one is higher is the question. Also if you are just commuting, forget disc brakes and shocks. Go simple. You may also notice the gears that you use the most with the current ride you have. Less gear = less complex and lighter weight.
I find simple fixed fork non-mtb bikes in Canadian Tires quite decent. I'm eyeing a cheap Schwinn as a daily commute. No point in riding a nice bike to work what with the thieves in the Lotusland.