My last pair of Lowas was purchased in... 1977 I think.
Lowa is one of the traditional, long standing big name European boot makers. Peers include Montrail, Raichle, Scarpa, Asolo and Crispi among others. Over the decades, these names get hot and cool off due to a large number of factors such as changes in distribution channels.
Of course, within any manufacture, designs, lasts and manufacturing process change too, so it comes down to which design and model and fit - things that nobody on the net can really help you with. But in terms of brand quality, I wouldn't hesitate to get a Lowa if it fit me.
In terms of flat feet, I need custom orthodics for day/day street wear, but for rigorous hiking and backcountry skiing, I prefer Superfeet. My orthodics drop off so dramatically in the transition from the front of the arch to the ball of the foot, that I can blister there if I use customs for hiking. I find that even the rockiest of trails (hike mostly in New Hampshire's White which have a few rocks here and there) are softer than walking on pavement. For hiking my issues is dynamic stability of the foot and for this, SuperFeet work well.