Asmodai,
Sound components is nice, but leans pretty high end. The Audio Salon in Coral Gables is worth checking out. Sound Advice has more approachable items, nice shop as well. Believe it or not, Best Buy Dadeland Station has a pretty nice magnolia dept with some nice items from B&W, Sonus Faber, Martin Logan, Mcintosh, and some nice headphones. The Hollywood Sound has some lesser known audiophile brands and a great array of turntables, and finally there is a guy with a store in East Hollywood with a large selection of 2nd hand audiophile gear with some new stuff mixed in as well.