If the you like the Beartooths, and they fit you well, Check out the timberlines. I was in the same situation as you having one of there heavier boots but wanting something lighter with no insulation. Picked up a pair of these and they fit the bill nicely,No complaints on my Beartooths after two seasons or Crispi Colorados after a lot of use this spring. I’m sure the Crispis won’t last as long as the Beartooth, but I wanted a lighter synthetic boot for warm weather. When the Beartooths wear out I’ll either go with the Schnee’s Granite or possibly the Scarpa Wrangell or Grand Dru.
Those La Sportivas look nice, the newer Schnee’s have a similar lower lace lock and I really like it.