I use the meshes from Taburet for Norway, Italy, France (excellent Corsica 5m Mesh) and Canary Islands. They are good, updated, nearly no popups and i have no performance problems with my old laptop.Flying norway with this Taburet mesh and the googlemap replacement files (free mod) is excellent.
For the Himalayas\CentralAsia i use the orbx mesh.
I am in no way associated with taburet, and i find their other products such as roads,.... etc not as satisfying.
Cheers Repman