My preference has always been the Thomastik Jazz Flats of the 43-100 variety. I like the low tension, as you can actually bend them and play dynamically. They feel a quite similar tension to the Elixir 40-95 set I have on the American Performer Mustang. I just put the Thomastik set on my Vintera II Mustang, as the previous owner had put the usual LaBella DTFs on, which just killed all of its character and sound - the LaBella E-string was previously sending the tone into a deep pit of durge and despair!