I own the Jane Crosswalk 3in1 stroller system, and I am extremely satisfied. Jane produces these in just the separate - stroller version, as well as in the stroller system sets.
Crosswalk's suspension system is fantastic. It can handle even quite brutal conditions easily - even with one hand - or 3 fingers! Awesome solid big wheels. Carrycot is spacious, featuring ventilation and backrest incline adjustment. The seat unit can be clicked on facing you or facing the world. Many backrest positions are available.
We are using it for our second child already, and it still looks like new. Everything is fully washable. Personally, I would not choose any other model even now. No problems with servicing it, and whatever accessories you need - the sibling board, a footmuff... Jane offers it - and really well-made. One more advantage - the handlebar can also be positioned (3 positions), which is ideal for taller parents.
Good luck when choosing yours.