Pre-amp for McCormack DNA 1 Deluxe

I recently purchased the DNA 1 Deluxe and probably will upgrade it with upgrade B offered by Steve McCormack. I have been told a few different things by a variety of salesperson, each with a product to sell. I would like some comments from other audio nuts re: what is a good pre-amp for this amp? Speakers are B&W Nautilus 805s, CD is CAL DX-1 and tuner is entry Rotel(but a very nice one). I am using Kimber Silver streak interconnects and Alphacore MI2 speaker cables. I am currently using the pre in my Arcam Alpha 9. Would a tube pre-amp give me a more tube-like sound? Can I get the same from a SS unit such as the Adcom 750? Thanks to all who help this pre-amp challenged audio nut.