Look at the Kenetrek hikers. Very nice boot made in Italy. Nice thing about this brand is when the sole wears down, you can get them resoled. A lot of other brands mentioned here will not do that. They also make a good winter boot.
They have stood up to the abuse that i put boots through. I have only had one pair of boots last over a year and those i used only for pruning. These i used for everything pruning and removals. They stand up to the abuse a climber puts them through. If they have any downside id say its that the sole is a little on the soft side. That will go before the boot. I'm sure of it. But still, the best all around boot ive worn.
I been rockin a pair of lo top 5-10's-tennie,awesome rubber but the saw dust sucks and they lack stiffness-sole support. A bit less comfortable with the foot ascender but not bad,i was even wearing my gaffs with em a bit. Just got a pair of arbpro and wow they comfy,not as grippy though.
Favorite climbing boot so far is salewa mountain trainers, with fire tail evo's at a close second. I don't find the evo's as comfortable with a foot ascender as the mountain trainers. For spur and ground work I'm loving the danner distressed boot, probably the most comfortable boot I've ever had right out of the box.