I just wanted to say in relation to the three wheeler prams, as Custardtart said you need to get a good sterdy one.
I know there are alot of cheaper ones on the market and while I was at the shopping centre on Monday I witnessed one falling over - thankfully no baby inside!!! but baby stuff went everywhere.

I bought a great second hand medium size stroller that is lightweight and can be folded down with one hand while holding baby in the other - this for me has been great.

Although I did purchase a large pram that also converted into a bassinet which I used for walking and was great for baby to sleep wherever we went and in the loungeroom- also great because it was safe to rock her to sleep and leave her in it all night.
Hope this helps.