What is outdated? The maps? Have you looked into buying updated maps for it? If by outdated you mean it's bulky and old looking then I would suggest looking at Garmin Nuvi models (600 or 700 series). That should hold you up for another 4 years before they start looking outdated too.
p.s. Once they come out with OLED devices in about 4 years or so pretty much everything is going to look outdated.