You won't really be able to do Magic Loop w/Boye, the cables are not nearly flexible enough. I did it for this projectand it was miserable. And that was with regular Boyes with 30" cables. If I had used my Boye interchangeables, I wouldn't have had a cable long enough for ML, and if I tried to use the joins to make it long enough, the joint would have been in the way - not to mention that with all that stress the joint and the tips would have been coming loose every round.
I like my Boye interchangeables just fine, but I do feel the need for a second set of IC's, I'm thinking of going w/Options when I have budget (maybe next year when DH finishes law school...)
I can definitely understand why people don't like Boyes. With the exception of my set, I inherited all my other Boyes from my mom, so they are sentimental. Otherwise I wouldn't put up with the stiffness of the cables or the dullness of the tips (though the IC set is much sharper than the individual needles that I have, and I don't know if new Boye circs are sharper than the ones my mom gave me).