Good to see someone else grooving with the Sunfire Architectural Sub. Dontcha love it? Don't hear about it enough on the 'gon. Pre or CDP? I'd go with the cdp. Read my review about the Audio Aero Prima. I know, I know, I've talked about this adnauseam, but it's fabulous. Will go tete a tete with players 2x the price and hold its' own. I love mine. The tubes make it pretty toasty for digital. Drop me a line if you want to know where you can purchase the Prima at a great price. Of course your pre and power conditioning are places to go. When you're ($$)ready. I'm an Audio Magic guy, but there are, certainly other conditioners out there that may do it for you. Very system dependent. peace, warren