Miyabi is Henckels' Japanese company. They make some interesting knives that are widely distributed and well supported. I think you can get better bang for buck for knives typical of any of their lines; but buying something from a brick and mortar which will let you visit the knives before you buy, and take care of returns and repairs without question may be worth it to you. Comfort and reassurance shouldn't be underestimated.
When it comes down to it the biggest things are sharpening and knife skills. A very sharp Miyabi in the hands of someone who knows how to use it will be more productive than anything dull and/or poorly used.
Learning to sharpen can change the way you use knives by allowing you to use techniques which rely more on edge than power. Good sharpening can make prep fun for a home cook, and much less of a burden for a pro.
The biggest choice is whether you're going to sharpen freehand on bench stones, or use some sort of "gag" to control angle holding. There are a couple of really good gags made by Edge Pro and Wicked Edge respectively. There's not much to learning them, so you'll be doing very good sharpening in no time. You lose some versatility perhaps compared to freehanding, but the biggest drawback is initial expense. Entry level is around $200. One of my sharpening kits is an Edge Pro Chosera, and it's great.
Other sharpening systems like the Mino Sharp 3 stage, and Chef's Choice Electrics aren't nearly as flexible, but you can get adequate results for $80 -- with an even flatter learning curve. Something very simple and convenient like one of these is the best choice for a lot of people, who don't want a lot of trouble. I bought my daughter a Mino Sharp 3 stage for her MAC Pros and she's extremely happy with it. I've had plenty of Chef's Choice electric experience -- my own and vicarious -- and think that even though they're not perfect, they're a great solution for someone who really wants "fast and easy."
You can spend a lot of money on stones, but it doesn't take much to get started. Figure $60, or so for a decent "combi" water stone. I've got about $125 in my oil stones, and close to $300 (if they'd been purchased retail) in my water stones. You'll probably want to go water stones, but it depends on which knives you decide to buy.
I'll be happy to answer any questions you have, but don't want to recommend one system over another until I have a better sense of which will work better for you.