I really like my Combi Twin Savy, side by side. It is light weight and folds down very compact. The graco bucket carseat that we have fits in it facing forward. It is not advertised to do this and doesn't snap, but it has worked fine for us.
I got this stroller with my second. My kids are space out 28 months between the first two, and 21 months between the second and third. My oldest is now 5 1/2 and still fits in it. In fact I've squeezed all three of them in at times.
If you do jogging of a lot of walking on bumpy terrain it may not be big enough wheels, but for our use it has been great.
Both my sister have his model. I got it for about 150 of ebay (I think it was new)
They also have one of the similiar models that officially hold the Combi bucket careseat. You have to buy an extra attachment. But we already had the Graco and it's been no problem.