Recommended Preamp for pairing an Adcom 555II Amp and Theil CS 3.5 speakers

My Bryston 0.5B preamp was inadvertently put down over the holidays by an incident now known as 'The Sippy Cup Mystery'.  Regardless of the cause, I need a new preamp for my system.  I am driving a pair of Thiel CS 3.5  (with the electronic bass equalizer) speakers with an Adcom GFA-555II amp.  The majority of the eclectic music (classical, 80s, folk, funk) being played on the system is streamed from iTunes through my Audioengine B1 DAC.  I have read a number of posts with various recommendations for the GFA-555II or the Thiel CS 3.5s but not for their paring.  Short of winning the lottery this week, cost is a factor. Any suggestions or directions would be very much appreciated.