Congrats on your choice of a 510 model I am sure that will do wonders for you. If you really don't want to feel like you got rooked or experience buyers remorse I would not order that $200 kit for doubles/couples when you can get the same thing for a lot cheaper than that. You have done the research so far on what kind you want, I really urge you to take it to the next step and do the research on the best price for your product. Just off the top of my head I can think of half a dozen places to get 2 complete kits with PCC's for about 40% of the price you are willing to pay. I was under the impression that money was a bit of an issue. I want to go so far as to say that if I can't find the exact same thing for half the price I will pay the difference in price. I know for a fact I can find two complete 510 kits for $100 or less.
Sludge made a good point as well. It probably won't be an issue for you at this point but it may be one later down the road. The manual battery is out for the m4xx series for those that prefer it. I am retired and the loudest thing at my house is me yelling at my kid when she screws up which thankfully ain't often, so I don't worry about noise setting it off. Some people though that can be a serious issue. For what it's worth I prefer my Dragon which is the same thing as the EVO, dipping is just nice and easy, and I like the draw on it and the auto function, even though I may be in the minority on that last part with all these young whippersnappers in here complaining about the club life setting off their electronic smokes, lol!
Oh and Sludge it don't matter to me but I don't want you to get your penis smacked for double posting, there is an edit button to extend, or correct a post you have up, fyi.
Snark