The consumer website below (Consumer Search) collects and consolidates reviews for all types of products and makes recommendations based on their analysis of various reviews. The link below is for their latest recommendations/compilation of reviews for multi-function printers (last updated in January 2010). A couple of HPs are in their top 6 "best picks" but the other four are from various other companies:
http://www.consumersearch.com/multifunction-printer-reviews
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You may also want to look into Consumer Reports...the last time they reviewed all-in-one printers was in their November 2009 issue (they also did a review on a wide spectrum of printers in their December 2009 issue). They also publish a yearly "Electronics Buying Guide" which includes printers. Both of these (the magazine and the Electronics Buying Guide) should be available at your local public library.
Or, for $5.95/month (auto-renewing, but you can cancel at any time), you can subscribe to their online version, which offers a full ratings/report on many types of printers (examples/links below):
All-in-one printer ratings:
http://www.consumerreports.org/cro/electronics-computers/computers-internet/printers/all-in-one-printer-ratings/ratings-overview.htm
Their overall printer guide (with Overview, Ratings & Reliability, Recommended, Buying Advice, and Price and Shop sections):
http://www.consumerreports.org/cro/electronics-computers/computers-internet/printers/index.htm
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In addition, Castle Ink (the company I work for) has posted a two-part guide to all-in-one printers - about what to look for when purchasing an all-in-one printer and comparing the top all-in-one printers:
http://www.castleink.com/_a-AllInOnePrinters.html
http://www.castleink.com/_a-ComparingAllInOnePrinters.html
Hope this helps,
Kerry