It is crazy, off-the-hook beautiful right now, no? A little warm, perhaps, but we'll take it. So we thought we'd break your undoubtedly sunny mood by making you insanely jealous of Boston's most expensive new listing: this 4-BR, 4.5-BA, 3,768-square-foot triplex at 184 Beacon Street in Back Bay. Yes, yes, quite elegant. And quite a history, too: a governor of Maine kept it as a second home; Emerson College sought to turn it into a TV studio; missionary priests lived there before it was bought and converted to four condos. But what really should induce envy is the fabulously open deck. Yours for $4,750,000.