Leica Trinovids: Old vs Recent

I'm looking for a pair of compact binoculars for hunting and have more-or-less settled on the Leica Trinovids.  They would seem to have the compactness and performance that I'm looking for.  Here in Canada, new ones are going for around $1000 ($775 USD) or so.  However, there are lots of used Trinovids for sale here for about half that price.

I'm wondering whether I'd lose out by picking up a pair of used ones (assuming, of course, that there were no structural or optical defects present).  Many I've seen have the label "Leitz" as opposed to "Leica," and I gather that the older ones used the Leitz labelling before the point when everything Leica made had the Leica label.  So a couple of questions:

1. Are the recent ones that much better optically?  Better lenses, lens coatings?

2. Would a pair of older ones provide sufficient optical quality for general hunting applications?

As always, all help will be much appreciated!

By "compact" I meant small and light.  The Trinovids I've seen are small and weigh around 8-9 oz.  I'd like binoculars that I could carry in my pocket.  As for magnification, I was thinking either 7 or 8.  So a 7x25, 7x32, or 8x32 would seem about right.

The used Trinovids I've been looking at have been in the $300-$500 price range, and, if possible, I'd like to keep the price in that range.  Are there other options that would represent better binoculars and fall in that price range?