You're making it way too complicated and doing it too much too quickly. The responses to your question are good, but they are encouraging your over complication. You are new to tubes and you've just secured two new tubed components. Spend the next 4 to 6 months enjoying what you have and acclimating yourself to their sound. It's a cliche, but rediscover your music collection. Once you get over the newness of the sound you'll be in better position to judge what you want to change, if anything.
BTW, what loudspeaker are you using with the Quicksilvers?
BTW, what loudspeaker are you using with the Quicksilvers?