12:42 p.m. on March 16, 2010 (EDT)
Congratulations on expecting, LaurieAnn.
Obviously, I like the Deuter kid carrier and think it's an excellent one to consider, especially if you've had good luck with other packs by Deuter.
There are some other brands worth consideration though.
Sherpani makes a couple that get good reviews. When researching kid carriers last year, I read a good review for the Sherpani over at backpackinglight. Ultimately I went with the Deuter though, since I preferred to get the one from the more technical pack company.
Vaude, MacPac, and Lafuma, were others I considered, but I couldn't find them in person or get enough good review info to warrant choosing any of them.
No matter which model you choose, here are a few points to consider, in addition to the all-important fit, fit, fit:
1) How much capacity do you really need (capacity ties into weight, so get as much as you need for how you'll generally use the pack, but not too much more). Sometimes I wish I had the Kid Comfort II (which happens to the top-rated kid carrier on Trailspace), especially when I hike without another adult. But it's been nice to have a pound or more less of weight too. It also has some features I miss on the I (like a sleeve for your reservoir).
2) Get the removable sun/rain shade that goes with your model of pack (if it's not already sold with it).
3) Make sure it has a sturdy kickstand that folds back, so you can stand the pack up on its own (with kid securely inside) and get the pack on and off on your own.
4) Have both parents try on the pack and make sure you can adjust it between you.
Here are the Trailspace kid carrier reviews:
http://www.trailspace.com/gear/backpacks/child-carriers/
If anyone notices we're missing any amazing kid carrier brands, let me know and we'll add them. Thanks.