Go for it. Those cots look great to me. I was given one for my girls n was no where near one of those places for ds, so ended up paying $400 for his on sale.
Both carseats i got from toy world. The first was $180 n did anth the girls. I have now passed it onto a friend of mine for her twins. The one i have now was $220. It has a stabilizing bar. I haven't had coz problems with it yet. Hopefully i won't now he's forward facing.
I think as long as they are the australian standard they should be find. Just make sure the mattress fits snugly & enjoy!