Some of the more sought after and appreciated 101 Strings releases are those with Les Baxter conducting. Que Mango! is considered the best musically and a major highlight of the entire catalog. Funnily enough, it is the only one of these four releases with a track listing different from the other three (Conducts 101 Strings, Exciting Sounds, and Million Seller Hits are all the same record from different labels.)
A good review of Que Mango! here.
A rare release with Les Baxter arranging but not conducting is: 101 Strings Plays Hit Songs from SPAIN: Songs Made Famous by The Mocedades.