I just wanted you to know how much your response helped me. I registered for a Chico KeyFit 30 infant car seat, with a base and an adapter for the Baby Jogger stroller that I wanted, thanks to your answer. Now, I just need a convertible car seat. Here goes.......
TTC since July 2009.
MFI, Moving onto IVF-ICSI.
IVF #1 = BFP - sadly a blighted ovum discovered at 7 wks.
D+C 12/7/10.
IVF#2 - ER 3/27. 8 fertilized. ET 4/1; transferred 2 blasts; 2 frosties (total of 3 now)
Beta #1, 4/11 = 291! Beta#2, 4/18 = 2702. Beta #3, 4/25 = 17303.
Ultrasound #1, 4/29 = 1 perfect baby and heartbeat!.
7/21 = a/s! It's a boy!!
Robert Lawrence was born on December 1st at 4:32 am weighing 6lb 3oz, 19.5 inches long and healthy as anything!!

Re: ladychicago
Oh good!!! I'm so glad. Definitely don't feel like it is overkill. And I am a huge fan of the baby jogger strollers. You will love it!
You won't be NEEDing the convertible carseat for quite a while, but I certainly understand wanting to get it on your registry in the hope that either someone will buy it for you or you can get the discount afterwards. We are big Britax fans over here (they tend to get the best safety ratings). But good luck choosing yours!
Because we're fancy like that.