Upgrade to 10.04 and stay there it's LTS and will be supported for another 4-5 years, 10.10 support ends in 18 months when you'll have to upgrade again.
I upgraded from 10.04 a couple of days ago. Pretty uneventful. The only issue was that php magically got disabled in Lighttpd. Oh, and my motd kept saying both 10.04 and 10.10. Easy fix to motd.tail.