I'll throw my .02 in too. I own two rainbow leeks, and two blackouts. I've handled the chives; The chive is just too small to hold. Even my wife scowled at the chive's size. And we are both small people, at about 5-6 feet.
The leeks are nice, if a bit small. The point and blade shape may not appeal to you, but you'd be shocked at how accurate the configuration can be for scalpel-like applications.
The blackouts are a bit more traditionally droppoints. Ours are serrated. A great emergency/rescue type blade. Oh, yeah: The non-blackened version is called the "Whirlwind", I believe.
The coatings on both are great. The blackouts do admittedly show a scratch now and again. I've had zero scratches on the rainbow, but it is more a dress knife, and has only opened christmas presents and such.
The bigger/weightier the blade, the slower it's going to be. The leeks snap open with a sound like glass, they are that frick'n solid. The blackouts are a bit slower, and with a duller sound, because of the plastic handles. Still faster than heck, but remember that the blackout is set up with only one right-handed thumbstud. The leek is ambi, and also has a "flipper".
I've never handled one, but I think the next generation in size is called "Boa" and "Bump". I think the Bump is being made with a new generation steel as well, "s30v" or something like that. (I have one on order).
Best of Luck
WayLander