Good luck. How's that for a suggestion? Where in LA will you be? Pretty much all the shops are gone now, with the exception of a small few. There's Optimal Enchantment in Santa Monica (by appointment only) but you'll be expected to buy something. Mostly Vandersteen and Audio Research last time I was there. Shelley's in Woodland Hills, small and not too helpful. Mostly Mac and Maggie's and some Linn. Acoustic Image in Studio City out of his home, again by appointment. More eclectic stuff. That's about all I can think of. BTW, these three shops are in three corners of LA and not too close to each other.