Quality Suitcases Any Recommendations On Where To Get A Medium Sized, Travel Backpack For A Low Price That Is Still Good Quality?

Any recommendations on where to get a medium sized, travel backpack for a low price that is still good quality? - quality suitcases

I'm going to Europe to study abroad in Rome, 5 weeks, then I'm going to visit Paris, London and Amsterdam, perhaps, if I go. Because I live in Rome, will be 5 weeks, I get more variety if it is purely hikers. So I'll carry around a medium sized suitcase with wheels. All tips for the average company, backpack trip? Good quality and lower prices.