Well it sounds like you guys are pleased with the results and I definitely like the fact that "it's a dream to downshift and match revs". Since I do not have all the necessary tools to install one and set the idle to 1300rpm I will have to first buy one or like you said Herm have the stock one lightened and then bring it in to the dealer.
Go with a stock / lightened if you can make it happen. Much better bang for your dollar.
And, like Raux mentioned, the stalling issue is no big thing to get straightened out (i'm just a little slow/lazy sometimes...)