my longest lasting boots were some Meindl leather hikers similar to those shown above (I think Cabelas sells a current version of those as hunting boots). The La Sportiva Trango GTX I use now are much more comfortable and ligher, but the durability of the foam in the soles is poor and after just 300 miles the cushion below your feet is down to half the original thickness.

In the 80s, I used some proper mountaineering boots - leather, 6 pounds the pair - they never failed, were fantastic in the loose stuff and on snow, but painfully uncomfortable for hiking. It's all a compromise.

I know of a PCT hiker who swears by his Lowa boots - has done more than a full PCT in them and no real issues. They look similar to those pictures above, and probably cost about $300