If you find out from Swarovski what was wrong with your NL's let us know. You have made a good choice in the Habicht 10x40 GA. I think it is the best all-rounder of the Habicht's because it shows less glare than the 8x30 W and it has a wider AFOV than the 7x42 W. The GA model is built like a tank and it has bigger more comfortable eye cups than any of the black eye cups on the W models. The focuser is a little tight but you do get used to it. It is very precise with no slop in it. The big advantage of any porro and especially the Habicht's is their 3D view and their high light transmission. They are great for hunting or animal spotting in the woods because you can pick out animals better from the surrounding trees. The Habichts are probably one of the highest transmitting binoculars you can buy and will be brighter than practically any other binocular of comparable aperture. The Habicht GA is very tough and like you said it will easily give you a lifetime of trouble free use. I am confident you will not have any problems with a Habicht.I sent my faulty NL's back to my dealer and received a full refund. My days of purchasing modern roof prism binos (or latest & greatest 'anything') are over. I don't have the patience for sending items backwards and forwards for repair & servicing.
I've ordered a Habicht 10x40 GA, and it'll be the last binocular I'll ever need. Tried and tested over 70 odd years.