What am I giving up replacing my Leica's with the Swarovski? I'm very happy with the Leica's but do not think I want to carry both. I'm considering selling the Leica's to fund the Swarovski.

i don't think you're giving up anything, in fact I believe you're on the gain. I prefer my el's over by bca's by a good margin, plus the warranty service on swaros makes leica look like dipsh-ts