There are two things that make iP49 stand out from the pack: its enclosure and integrated alarm clock radio functionality. Whereas iHome’s less expensive iP46 was a straight-out clone of Logitech’s old but impressive mm50 audio system, iP49 is something different: a 10” wide, 5.75” deep and 2.25” thick package that looks sort of like a plump MacBook, using a hinge to open into two halves. iHome says that iP49 has “four…