Your options are reasonably limited - first by budget and second by availability, if price is of no concern. Do you want a big power box or do you vape 40W and under? Do you want a mass produced Chinese box or a custom, small batch squonker? Do you need temperature control for more wires than Ni200?
Even without knowing the answers to any of those questions, I'd have to recommend the Lost Vape Halcyon. Relatively reasonably priced, available, and uses the versatile and proven DNA200. And, I think it looks pretty great. I own one and plan to purchase another.
I have never used any Kanger mod of any type so I can't speak to the performance/TC capabilities.