those carseats are awesome! they are very cool, and they are pretty much the best out there. i have 2 as well, at 2 different stages they are very nice.

the slings you might want to hold off on, i got one for my little guy and he hates it. such a waste of money.

and i think of your stroller choices the zooper is the best, although i wouldnt personally use a side by side one, such a pain in the arse in stores etc. it does come in other colors too.

I had to use a double stroller with my older kids, because they were so close in age ( 2years apart) and I quickly got rid of my side by side and went to a front to back stroller. The side by sides are a pain in stores. The car seats are the best, really good choice there. I love love love my sling, but not all babies do so be prepared to change plans

I hated the sling so did my baby. So I took it back and get the front carrier so much better and they last longer! Also be careful a lot of them are being recalled they fall in Especially being so little and can easily be sufacted. As for the diaper bag it doesnt look big enough. I only have one child and a pretty decent size bag but that still isnt big enough and you are having two! Even two of those bags arent big enough. And whatever stroller you get make sure they lay down cus I know some of the side to side strollers dont lay down. Even my single stroller is a pain to get between Isles so I cant imagine having a side to side one!

Yes i agree with HL1.
Your hubbys mums paying for it all!Wow!
I take it she can not wait to be a grandmother!
By the way im Holly hubby Matthew so from a father to bes point great choice!
Ill have to moan at mine and holly parents see if they help pay!
Im sure theyll help both of our mums loved the fact that theld be grandmothers exspecially mine because Hollys having a little girl!
And my mum always wanted a little girl but she got me and my younger bro! So now she has the opertunaty (sort of again)
Matthew