If you are opening a business then Singer and Juki have some very good industrial machines. You'll need to deal with an industrial machine specialist to get the correct machine for your purposes.
The best of the best in home sewing -and the most expensive machines -are made by Pfaff. Their top of the line machines are what every sewer dreams of. If you want a machine that you will never grow out of then a Pfaff is the way to go. They have some machines that allow you to design your own stitch patterns. I have one that I use to design special buttonholes for special designs.
For sergers, coverlocks, and combination overlock/coverlock machines BabyLock is my preferred brand. they are the fastest and easiest to thread and that is super important. I have an industrial Singer that takes an hour to thread!
Also good: Husqvarna/White. A company that makes the best chain saws, weed whackers and lawn mowers also makes some fantastic sewing machines. My Daughter in Law has a Husquvarna and she loves it. Bernina is good but I find they are very expensive for what you get.
Singer is up and down -some machines are great -some not great at all. Buy from a Singer Dealer, do not buy Singer machines from Walmart,. Costco, or Canadian Tire.
ALWAYS buy form a sewing machine dealer. They give lessons on how to use the machine, annual service and they offer lemon-aid protection. If a machine doesn't work out of the box they will often replace it with one that works. Don't buy from big-box stores. It's a false economy -if you can't operate the machine or get it to work then you have saved nothing.
And that's the bare bones basics on sewing machine brands.
I am using a singer machine which is old but providing me a very good service. Besides, there are many new models which are really good you may search for their website to find the best one.
Best for what purpose? And at what price point? If you're looking for a good beginner machine, I'd probably tell you that I think Janome and Juki have the edge on quality per dollar invested in a new machine. But the machine I'd suggest for someone who was going to be quilting hour after hour is not the one I'd suggest for someone who wants to do heirloom sewing. Or machine embroidery.
Here's some more information on beginner sewing machines and why I don't care for the really cheap new machines: https://answers.yahoo.com/question/index... https://answers.yahoo.com/question/index...
Personally, I sew on a 15+ year old Viking electronic, a 3 year old Juki computerized machine, a 60 year old Singer 15-91, and a couple of Juki-made sergers.
Pfaff, White, Singer, Brother to name a few. The first one is the best in the garment industry and you pay for it.