German para boots are, in my opinion the best. The older model, MK 4 in the U.K. (or model 2000 in Germany) are the padded ones with sewn on soles. They stopped making these boots,( army issue) in 2005 when the German army changed design & manufacturer.( they changed a few things again in 2007 which is the boot the army uses today)......I mention this because these boots were/are very popular & the market was/is flooded with copies, some ok, but most are crap. If you see a pair of these boots for sale, new, they are without doubt fakes......so beware.
There are still some genuine army issue boots for sale here & there,used of course,( beware too, if described as grade 1, in my experience they are more like grade 2 & worse) but are becoming as rare as hen's teeth to buy.
It's true they can be resoled in theory. I've had several pairs that I expected to resole when the time came but I found the uppers didn't last long enough. Usually after about 3 years of good & loyal service ( note that these boots were made to last a year, an army year that is) the leather around the toe, where it is stiched, rots away,( the lining is fine) I don't know if this is has happened to other people,, but the 2 good pairs I have left ( knowing I can't replace them) are recieving particular attention in this area.
I have heard only good things about the newer model, though I have not tried any yet. They have glued on soles, with a sort of rand, but have the same sole pattern as the mk 4's. They are supposedly more water proof, the soles more hardwearing,& are every bit as comfortable as the mk 4's. Personally I don't like their design, I much prefer the older type.
The new model can be picked up, used, from between £40- £50 in very good condition. There arn't any copies of this boot around yet ( probably because it isn't as popular) so you have every chance of getting a good pair of boots.
In conclusion, my preference is for the MK4's, but because you have little chance of finding a decent pair I can only advise you to check out the newer type, see if you like them. They are a good boot, tough, reliable & technically more advanced than the MK4's.& made by a excellent footwear manufacturer; Haix.