Yeah definitely the Istick.
Also, if you're looking to spend a little bit more.. Well, a lotta bit more.. The Vaporshark DNA40's are due to ship next week (ideally). Those are gonna be really sweet.
They're also releasing nickel coil BVC heads for Nautilus-style stuff, meaning you can get temp protection features on a Nautilus/Mini/anything else that'll take it. That's gonna be fan-flippin'-tastic.