Sven,
Recently took the plunge into 26xxx land myself. Though on the expensive side, have a look at Super T's 26500 or 26650 simplicity. They offer a slanted top that will make your existing 22mm toppers look nice. I've been quite pleased with mine thus far. The switch is simply fantastic to use and the machining is among the best I've seen. I will note that their design requires the use of an o-ring in the base to accommodate different battery lengths -- but once you get used to it, it works out fine.
Much as I like my simplicity, I would be remiss not to note the newest guy in town, the Ox, by fogmonsterz. This will be the shortest 26650 you can buy, at 85mm (to put that in perspective, it is the same height as my 26500 simplicity). This height savings is accomplished with a semi-hybrid style cap with no firing pin (the 510 pin on the atty makes direct contact with the battery). This means you will need to be very careful about which toppers you use -- if the pin does not protrude enough from the 510 ring, you can get a hard short. I don't know if these are available just yet, but they should be in the next week or two, and I imagine people will be jumping on them straight away. Here's a review from Todd:
The OX26650 by Fog Monsterz - YouTube
Now, some ideas on toppers. First thing, note that there seem to be two competing widths out there-- 28.5mm (like my simplicity) and 30mm (like the ox). So if a flush fit is important to you, make sure to match this to whatever topper you buy. I've found some good matches for my simplicity. First, tobeco has come out with a 28.5mm kayfun clone. It looks perfect atop my mod, holds 15ml of juice, and when paired with a high mah battery, you vape for days at a time with no filling or charging. The only downside is the size of the resulting rig. Even with the 26500 version of the simplicity, once I put that tobeco on top, the result is something too big to take out and about. But I use it as my main vape next to the couch and couldn't be happier. And while I am not generally a fan of clones, I have to say this tobeco version is all around excellent. Vapes *exactly* like my original svoemestos -- and cost me all of 35 bucks.
As to drippers, check out the 28.5 mm Armor by manbo -- also very affordable. Here's a review by todd:
The Armor 26650 RDA by Manbo - YouTube
And should you instead end up with a 30mm mod, have a look at the asmodus:
Asmodus 26650 RDA - YouTube
While there is no 30mm version of the kayfun, you could either put up with the small ledge you'll get when using the 28.5mm tobeco, or you could consider a kanger aerotank giant:
https://www.youtube.com/watch?v=tNg2li_G0E8#t=432
Hope this helps! Good hunting, and let us know how it works out!
--Steve.
PS: I own three original kayfuns and have had *no* issues with wicking. I run them with 28 gauge micro coils, 7 wraps on a 5/64th drill bit, for around 1 - 1.1 ohms. I position the coil such that it if the terminal screws are North and South, the coil is sitting as close to east to west as I can get it. I then use organic cotton balls, rolled such that they pass through the coil with just the slightest resistance. Do not use too much cotton! I then cut the wick such that enough remains to make good contact with the decks below -- and NO MORE. I wet the wick and with the edge of a syringe, shape it so that it touches the deck without blocking the juice channels, and then assemble the chimney and tank. On first fill, I cover the air hole and gently suck until I see a bubble or two rise in the tank -- and then proceed to vape my face off.
If I do get any dry hits, which almost never happens, I tighten the airflow down just a nudge or two. This means that with each draw, you are bringing more juice up into the chamber because of the increased suction. And if even that fails, you may be using a really thick juice. Try adding a tiny bit of water to your mix - will thin it out and improve wicking.
With this set up, I can chain vape the entire tank and never get even one dry hit. (And btw, on those rare occasions when I get a gurgle that won't clear, I will relax the draw just a bit, problem solved). Hope this helps! Kayfuns rule!
