I'm buying an MES in the next 2 days and have been driving myself (and wife) crazy researching a few points. First, thank you all for sharing your thoughts in the earlier posts. I would just ask for any last minute thoughts if you have time. 1) Size is my major confusion. I will cook mostly for 2, on occasion 4-6 and very rarely more. Would the 30 be enough or another way to ask, is the 40 overkill? 2) There may be a lot of empty space inside the smoker when cooking for 2, does this have any negative implications? 3) With a larger retro-fit chip box, is the AMNPS needed? One last thought, Sams Club offers the 40 for $299 and Bass Pro's Black Friday Sale will offer the 30 for $179. That's only a $120 difference so the 40 seems like the right choice but my circular logic take me back to point 1. Any thoughts are appreciated as I want to get past my obsessive research. Thanks and Happy Holidays.