Quite a few makers have weighed in with serious leather boots that in some cases are available in insulated models. The Scarpa Cerro Torre Thermo you mention has thick water-resistant leather, a carbon midsole to support crampons, and insulation for cold temps. Not quite a winter boot, but good for everything else. Probably even good for many winter climbs with the proper supergaiters. Price isn't too bad at $375, and they're on sale right now for $245 (www.scarpa-us.com).
Other boots fit this category. Tecnica's T-Rock Thermal ($340; www.tecnicausa.com) makes extensive use of synthetic materials to create a boot that's light and versatile. Similar in application to the Scarpa boot, it's lightly insulated for cold-weather use. It comes non-insulated for $320, probably just fine for things like summer climbs on Rainier given the boot's totally waterproof design. You might also take a look at La Sportiva's excellent Eiger, a lightweight leather boot that's ideal for warm-season climbs on snow, ice, or rock ($275; www.sportiva.com).