We have the Uppababy Vista and BeSafe izi Go car seat too.
The uppababy is bigger and heavier than some so if that’s going to be a problem it’s worth checking some others out. Best plan is to go to the shos with your car and try getting the demo versions in and out of the boot, it can be a bit of an eye opener! The wheels do come off the uppababy which we’ll do if we’re doing a long journey with lots of luggage but otherwise it fits flat in our boot with everything attached (Audi A3)
Having said that, 6 months in and my wife still says how happy she is with it. It wheels really nicely and the larger than normal basket is a bonus if you’re planning on doing lots of walking to nearby shops rather than just go in the car.
Basically, as someone above said, you can’t have everything and there’s always a compromise. We choose larger wheels and basket and sacrificed a bit of weight.
Our baby never really slept in the carrycot section when not on the buggy (or a moses basket for that matter), just decided she didn’t like them! All babies are different so just be prepared to buy loads of stuff just to see if there’s something that will help them (and therefore you) sleep! Hope you get one of the well behaved ones…
As for the car seat, we were all settled on the maxi-cosi but the shop also had the BeSafe which has a 5 point rather than 3 point harness and just seemed a bit more protective, personal opinion though and i think whatever you go for your baby will soon learn to hate being strapped in!
Good luck with it all!