If you like the Mini Domin, also check out the Mini Begleiter. Recent models run on bearings instead of washers. They can be had in G-10, Micarta, or titanium; including some new versions with a "frag pattern".
As far as handle materials, Micarta is my favorite. There are different kinds of Micarta but in general, it looks nice and feels great in my hand. It can have the warmth of wood without any of the sensitivity to moisture, solvents, or light abrasion. It can be polished or left rougher, often leading to a delightfully soft surface texture.
Compared to WE, Kizer is very good but not quite as nice. Comparing similar products, the WE-made stuff is just a little bit better on average. That in no way should be taken as a knock against Kizer. Like I said, Kizer is a good company with good products. In my personal experience, WE is just top of the class across tiers in the $40-250 range. (I don't own any folders more expensive than that and probably never will.)