In fact, if you go to the Life With a Babe forum and do a search for sling (look in the lower right hand corner of the page for the search function) you'll be up all night reading! :LOL
The short answer is, there is no one perfect sling for every mama and every baby. There are pluses and minuses to all of them. You may end up with more than one, as your preferences and needs change over time. That said, I think the Maya Wrap is a good choice and very versatile.
Two sites that have good pages of sling comparisons are
You can also often find Maya Wraps and other name-brand slings on the Trading Post here (when you're eligible) and on ebay.
Come visit the NEW QuirkyBaby website -- earn QB Bucks rewards points for purchases, reviews, referrals, and more! Free US shipping on great brands of baby slings and carriers and FREE BabyLegs or babywearing mirror on orders of $100+. Take the QB Quiz for personalized advice!