Attention all Parents with small children!

[QueenEsther]

Ok, I am looking to buy a new stroller - I really want one with the baby seat that attaches and unattaches and as I have been looking, comparing and searching for that perfect one I noticed that alot of them will allow just about any car seat to attach to them - which would be great since I already have a perfectly fine car/infant seat, and while looking I noticed that the tandem or double strollers also fit the car seats in the back seat of the stroller - any infant car seat that is.

So, my question is for those of you with multiple small children what is or was convenient for you? My oldest is 4 I am due again in April. Will it be worth my money to invest in a double stroller or do you think my 4 year old will out grow it too quickly? Are they convenient or more of a pain to haul around a bigger stroller? I am just curious. My daughter is old enough to walk unless we are going to the zoo or an amusement park or something but I know that when I am pushing the baby around in a stroller she will be whiney wanting to ride also.

What are your suggestions???????????????