I like the Chit Chat as a compact stroller but you can't use it with a car seat. You can buy an adapter for the Coast stroller, but I found it kind of unwieldy (easy fold was also very important to us).
We wound up going with a Baby Jogger City Mini. It's not the best looking or most interesting stroller out there (they are ubiquitous) but it had all the features we wanted and, importantly, is incredibly easy to collapse and unfold. We live in a walk up apartment and keep the stroller in the building lobby (with permission from our neighbors) so we really need something that is easy to stow away without a lot of effort.
I was curious about the Clek so was doing a little Googling on it, and did come across this page that might be helpful to you:
https://strolleria.com/collections/strollers-compatible-with-clek-liing-infant-car-seat