If you want something similar to Ubuntu, but something that is much more stable, I highly recommend Linux Mint. I've been using it for about 4 years now and it's a delight. Very stable and doesn't give me a lot of issues after upgrades. Their upgrade-schedule and the upgrades itself are very conservative.
They've based off a Ubuntu LTS, but I think they are starting to move away from that.
They've based off a Ubuntu LTS, but I think they are starting to move away from that.