I currently use Thomastiks on my jazz guitar, and when the top two unwound strings corrode (as I go through strings very quickly) I replace them with spare 13s and 17s (or sometimes 14s and 18s) from Elixir. Because they are coated, they last ages. I have been using Elixir Nano 10s on my other guitars for years, and I am very happy with the brand.