Hi V.,
You must be a "planner" like me! I did the same thing you are doing and researched EVERYTHING before adding it to my registry. I primarily used Amazon.com---not only for their customer rankings, but also for their customer-published "Top Ten" lists, such as top must-have items for a new mom, etc. (I often clicked over from the lists to that product's entry to see the overall rankings before making my final decision). I also used babycenter.com for those items I didn't find on Amazon.
I not only used the Amazon lists, but also the Baby Bargains book as a starting point to then understand what I wanted to look up on Amazon or babycenter.com for ratings and customer feedback. Then, I either added that item to my Amazon or my Babies 'R'Us registries, whichever was cheapest!
Drop me a line if you want anymore info at ____@____.com (that should say debusedtoscuba b/c I haven't been in 3 years, thanks to my now 18-month old!!) ;-)
Good luck!
D.