If you can get the L920 for the same price, and those 32GB of memory can work for you, then take it. I am still considering the L920 today because of the price. MS/Nokia will support their flagships, and the L920 was the device that kicked things off.
But, if expandable memory is a deal killer for you, I say the L820 is a good device and will serve you fine. I know a few people are saying wait to April. I find that sound advice if you are fine with what you have for another 5 months and if we knew for a fact brand spanking new devices were confirmed then. Problem is, we do not. Also, while that gives more time to save, the prices on what you want may be a lot higher then expected.
I say roll the dice. Shop around and buy the best device you can in your price range. Head over to the L820 forums.
Welcome, and hope you let us know what you choose!!