You have my sympathy. First you'll need more barrels. Then you'll need a scope for each barrel. Then you'll decide that you really need more frames so you can spend more time at the range shooting rather than switching barrels. And on it goes.
Congrats on purchasing one of the best handgun shooting platforms out there. They are extremely versatile, and very accurate.
They're like lays potato chips, you can't have just one.
Larry