I personally think it is better with a single souped up saber. 2 lightsabers are cool but they just don't work for me, i dunno maybe i'm crazy. As for the crystals I just got my saber 2 days ago so ive got like 8 crystals and they kinda stink. But for crystal color, i've gotta go green. Yoda, Luke, Qui-gon, and Saesee Tiin are my favorite Jedi anyway and they all have green sabers (and just because of Anakin and Juhani, I always watch people with blue sabers carefully, i know i know "what about Obi-wan or Shaak Ti or Mace's old lightsaber" but still I watch blue saber people like a hawk).