The revolver is an M702. I dont know about the sideshow but i own the M602 as well.
It depends on what you want. If you want something that looks like an analog a lot and has a PCC, go for the M702. For this, you can also check out the M401/2, which is also complete with PCC, Manual Batts but also has a USB Pass
thru that i enjoy a lot.
If you want better performance and longer lasting cartridges/ battery life with a manual battery, go for the M602.
I do not agree that the 510 is the best out there. When the atty works during the limited time (2 days) that it does, its very impressive but it loses power very soon and battery life is terrible to say the least.
I would recommend getting either the M702, M401/2 or the M602. Check out
www.absolutelyecigs.com for a much better price.