Keep it till about next April! Just before it goes out of warranty send it in for replacement. Who knows, by then they may be on v4-5, hopefully it will be v3 still though as I'm waiting to get my replacement and I hope it works well
Get them to send you a case, and while you have ity open check the fan wires. If it still works i see no reason to swap it out. I have a v1 that is still doing fine, need to update the firmware before I run it again.