Needs suggestions on which stroller to get. Kids using it would be DS 6 months 18lbs and DD 3.5yo and 40lbs! I have a Joovy and is absolutely will not push with DD in it. It worked great for two months and now the wheels even stick with DS. Turning it in any direction is horrible and impossible at times! So I'm looking at Peg Perego P3 or BJCM? Anyone have there and can testify to how they hold up after using them?