Mike,
I went for a maxi cosi pebble seat for the newborn. With an isofix base (a must) it made for instant fixing into the car. The base has a chime & lights that indicate if the base & seat is anchored properly. It's called the Familyfix.
http://maxi-cosi.com/products/car-seats/infant/pebble.aspxOnce you're mobile, I recommend a pushchair/pram that has a mounting system for your car seat. It makes life much easier to click the car seat onto the chassis for supermarket trips etc. We chose:
http://www.icandyuk.com/products.php?id=appleand bought a set of adaptors that link the car seat to the chassis.
Once the little fellow is too big for the car seat, the next size up (forward facing) will fit the isofix base you bought, so you simply swap seats. Under no circumstances be swayed by anyone who tells you that a seat belt anchored seat is just fine. They are a total pain to fit & remove (and you'll be doing that a lot).
I'm happy to take snaps for you of the baby seat, forward facing, and isofix base in situ, to give you an idea. Get some mesh sunblinds as well as a bootliner. You'll need to use the boot as an inpromtu changing area and your little darling will wait til you have their nappy off, then pee wildly and generously. Mine did. Thank God for boot liners.
Beware, what you are embarking on is a money pit of several orders of magnitude larger than your car can ever hope to be. But it's the best experience ever