I am having DirecTV installed on Thursday (after more than 6 years with Dish). The install will be for 2 rooms with a DVR R15 in each. Programming will include the Total Choice Premier package (no additional HD or internationals). I live in New York. Question: Which dish should I expect to be installed - the 18" round or the Phase 3 Oval? I have heard the oval does better with rain fade. Thanks in advance.