After premiering at January's Consumer Electronics Show, iHome's new iP3 Studio Series Audio System ($200) is finally heading into stores -- and here for testing. As a reduced size, reduced price version of the popular and substantially transparent iP1, iP3 features transparent edging around a soft fabric framed front with a dark gray rear plastic shell. Inside the unit are twin Bongiovi Acoustics-tuned 3.5" speakers and a digital amplifier, composite…