What is the best 4" x 6" color printer?

Need advice -- have a lot of digital images, and want to make 4" x 6" prints -- best quality possible, that will last for 20 years without fading or color shifting. Would also like a printer that is easy to use, easy to clean and maintain, from a company that will probably be around for awhile... where I'll be able to get paper and inks online or at local office supply or big box stores.

Any ideas? Would really appreciate your advice -- I don't know anything about home printers!

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Jonathon Donahue -- Olympus XZ-1 tips at http://jon404.com