Well the weather likely isn't a top priority considering he chose to play college ball at Notre Dame.....I think Murphy is going to see that Bosh is a starter, who does pretty much everything he does more effectively. Doubt he wants to play center alongside of Bosh who will be getting way more of the calls on the perimeter shooting plays Murphy would get most everywhere else.
Coming to Boston he gets one of the best pass-first PG's in the game, and two premiere perimeter threats on offense in Ray and PP to create way more space for him then he is used to coming from Indiana (completely disregarding Jersey). Murphy easily steals at least 5-10 min of Big-babys time because of his length and proven rebounding ability alone, and if our Center situation doesn't get healthy, he will get minutes there alongside one of the best help-defending PF's in the league in KG.
Miami is not built for 7 game series with most teams at the top of the NBA; if a ring is what he wants he should be well aware of their record with the playoff contenders, and head north. My only worry is if Brewer signs with Miami before Murphy, and he notices another fellow above-average journeyman make a decision that suggests he should follow suit.