I'm also switching my node to XT.
I've already switched mine. Doubled my bitcoin in five minutes. If anyone wants to buy BitcoinCore bitcoin, I'll sell them for a discount of $175. I am also selling the new bitcoin BitcoinXt for $250. Send me a PM with your address. I can make the trade today.
Is this a joke? you do realize that as soon as your XT client sends your coins they will disappear from your normal Bitcoin wallet too right?
Even if you wanted to you can't separate them as the TX's are identical and valid on both chains... and there is only one chain right now.
Later AFTER the hardfork you MIGHT be able to separate them via doublespend attack against yourself, but if things got that far no one would be accepting the old chain anymore.