I too live in London and so mainly walk places or take a bus, the icandy peach is fab, looks smart and really easy to manouvre. I had te same dilema as you, the bug is also lovely but the flexibility of the icandy to expand is helpful - mind you, not ready for next child yet!!!
We bought the carrycot and the pushchair, the quality is really good and DD is very comfortable in it - more so than her moses I think! The carrycot is unlike some others, fine for sleeping in overnight - so we're able to use it on hols this year rather than buying a carrycot - although I am having to buy a travelcase for the carrycot to protect it from the airline!
The base is quite heavy, but then they all are, I can mange to lift mine into the boot with no trouble and once you've read the instructions is v.easy to pick up and put down. I think the peach has a lighter base than other icandy's. My daughter is now 2 months old and I've had loads of comments on how nice the pram is and been stopped inthe street to ask where I got it!
The height of the handle is really good too, DH is v.tall, so good to be able to extend it.
Good luck with the rest of your pregnancy - get some rest, believe me, now is the time to conserve energy and indulge YOU!