Frankly if you're usually flying SAS and you can make gold with SAS you're probably better off continuing to collect on SAS. Sure, LH's benefits are better but only when you're actually flying with them. When you're not you're just fragmenting your points which makes it harder to cash them in later. The points on SAS will come in handy upgrading or buying other benefits on SAS.

I thought you needed more than 45k for gold with SAS though. I have a friend who's *G with them and he's generally happy, especially with the points upgrades. But he's jealous of my low qualification threshold.