I'm not a preacher, but my favorite study Bible is one called the Special Study Edition. It's a large print black Bible with a depiction of a sword on the front. I cannot locate the name of the publisher (in fact, the preface is simply signed as "The publisher"), but I think this is the same one.
http://www.christianbook.com/kjv-bon...9799?event=AAI
It looks virtually identical to mine. One thing I love about it is that they've (suggestively) added red letter text to the OT, where God is speaking. Also, there's a vast amount of reference materials throughout, and in both the front and back of the Bible. I also like using the Thompson Chain Reference, as well.
As for my pastor, I'm sure he has a number of Bibles available to him, but when he preaches or teaches, he prefers his iPad.