SBS 1150+599 is perhaps the holy grail of planetary nebulae, potentially beating Pease 1(?). It's a Population III planetary nebula in Ursa Major. You heard that right. It is the most metal-poor known planetary nebula. It is not really Population III, but it can look like it is. It is 3" in diameter and is magnitude 17.5, meaning this should be a challenge for supermassive dobs. But those guys here with dobs larger than say, 20 inches can feel free to observe this one in a few months. RA is 11 53 24.738 and Dec is +59 39 57.10.
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