Upgrade from Innokin iTaste Kroma

About 6 months ago I bought the Innokin Kroma starter kit with the slipstream tank. I quickly got sick of the slipstream tank and about two months ago upgraded to a Tobeco mini super tank which was an amazing decision. Unfortunately my Kroma has started to act up and just isn't working as well for me as it should now so I'm looking for an upgrade or replacement. I've looked into the iStick Pico and am considering that as I really like smaller mods I can just slip into my pocket, but I'd like some other opinions as well. The Kroma was my first actual mod, before that I had just used cheap $20 gas station pen type ecigs and had a love/hate relationship with them. It worked well for me and I loved it at first, now I want to try something else since it seems to be dying on me.