Been using Bugaboo Bee+ for my daughter for the last 8months. She is now 9 months and still sleeps in the stroller when we are out shopping.
Bought it for almost 3k (stroller + seat liner). Did some survey before my daughter was born and narrowed down to several brands.
But in the end, choose the Bugaboo Bee, although it is more expensive.

But is is worth spending that much money for just a stroller??
Well, my family is out several times a week, and for several hours each time. The Bugaboo Bee was much easier to handle and maneuver around the shopping mall aisle, house entrances, hotel lobbies, car parks, etc. This is compared to a hand-me-down stroller we got from a relative. So for my family at least, and for our lifestyle, the money is well spent as the stroller would continue to fit my daughter for many more months to come. And thereafter, for the next child (the Bugaboo Bee has a extend-able seat and backrest).

So you do really need to think about your usage and need to have a stroller. A stroller isn't necessary for everyone.