I can't say much about the Konosukes except to say they have a stellar reputation. I've had several each of the Moritakas and Hattoris. The Hattori knives have really terrific fit and finish, both the HD and the FH/KF. The steel Hattori uses is a pretty pedestrian VG-10 (albeit with a great HT). Personally I won't pay Hattori pricing for vanilla VG-10 anymore. It's not bad by any means but it's been surpassed IMO. VG-10 is somewhat difficult to sharpen (takes a long time to develop a burr, then longer to de-burr). The ultimate sharpness is mediocre, and edge retention won't blow you away. Still, if you're coming from a German knife you'll probably be very impressed.
Moritaka knives (at least the Supreme line that you generally see) uses Aogami Super for the hagane, a far, far superior steel to VG-10 performance wise. The Moritaka will sharpen more easily, get sharper and stay sharp longer. It will also patina easily and develop red rust if you leave it wet. While I don't want to overstate it, I do have to say that it's not at all uncommon to find quirks or minor flaws with the grind of a Moritaka. They sometimes require a little TLC to get 'em ship shape. A Hattori will be perfect out of the box.
You may want to check into the Kagayaki CarboNext from JCK, too. I have a 300mm CarboNext suji and couldn't be happier. The edge wasn't great out of the box but it will take a fantastic edge with a bit of work. It gets within a whisker of as sharp as any carbon I've seen (White #1, White #2, Aogami or Blue #2). Edge retention is very, very good and it's not difficult to sharpen. It's not full stainless but it doesn't rust easily. It's semi-stainless tool steel that will take an attractive patina with time.
I hope someone with some hands on experience with the Konosuke will come along. I've never heard a single bad word about them.
If I wanted a fairly low-maintenance knife for line use I'd go with the CarboNext. If I wanted a razor and was okay with babying it a bit I'd opt for the Moritaka.