Sell the heirloom point (450-500k gold or so), and then buy a +1 or keep saving. You can also go to 32 and get 2 heirloom points, so in 1 gen you would have enough for a Masterwork item if you are also making a bit of gold while playing. 31-32 takes about the same time as 1-31 (a bit longer), but you get the gen bonus sooner if you retire at 31. Being high level is more useful than a +1 imo, but you might want to change your build