Welcome to QB, from western Nevada! We've found that buying quality blades goes a long way to keeping satisfied with your cutting ability. You can buy all kinds of cheap blades and change them often, or you can buy quality blades that stay sharp and change them very infrequently.
We use 60mm Martelli blades and Martelli Ergo cutters. Even with shop cutting, which means lots and lots of repetitive full WOF cuts, our blades stay ultra-sharp for an average of 6 months to a year each, and that's a lot of cutting miles.
If you add up the "mileage" you get out of premium blades like the Martelli, you'll probably find out that they're cheaper than the cheap blades when all is said and done.