I'm Andrea, I'm an italian guitarist, or better, I try to play guitar
I will be in USA during this summer, and I would like to buy an acoustic guitar.
I like Martin guitars, so, I hope to found one of this brand.
My budget is 1500 US $, but I don't know where are some good "Guitar shop": my trip will be across California and Nevada (L.A. , San Francisco, San Diego, Las Vegas and other cities...), so if you will inform me where are some good and convenient (affordable price) Guitar Shop, I offer thanks to all!
So, Thanks in advance!

ps: I looking for Martin, but Taylor are welcome too...
SAMASH the musical insrument megastore!

go to samash.com or call 1-800-4-SAMASH for a store location near you!
i'd recommend samash or guitar center in general. most big cities have at least one of these two stores and they carry lots and lots of acoustics. they have a price guarantee so you typically get a good price also.

i got my 314ce off there for $1000 (instead of normal $1600)
Taylor 314CE
Modulus G2T and G3CT
3 Warmoth Guitars
2 Fender MIA Strats--SRV & JM
Alvarez w/ Modulus Neck and EMG DG-20s
Marshall JCM 2000 DSL 50 w/ 1960a cab
Breedlove AC250/SM12
Gold Tone Weissenborn
Adrenalinn III & FCB1010
ALOT of pedals