Hi Lapierre,
Audio Note AN-E/lx signature's sound is very musical, detailed, lively and slightly dark in my opinion. I used AN-J/lx and AN-E/Spe before.Lx signature has more refine sound and tight bass than the others.
I think the lx sign. is too expensive. AN-E/lx and AN-E/Spe are very good choice due to their prices and performances...