I have had a GFA555 and a GFP750 for my vinyl system for many years and I also have a NAD c165BEE preamp in another system. I've paired both preamps with my other amps - McIntosh MC2200 and Vincent SP-331 and none gave me the wide/deep soundstage I was looking for. So I decided to try a tube preamp - Aric Audio Unlimited, and the difference was shocking. I ultimately left the Adcom system the same because of the good phono stage in the GFP750 but the combination of the Unlimited with either of the other amps throws a huge soundstage - same speakers (Vandersteen 2Ci), same location, etc. The moral of the story is; if you want a soundstage and don't want to spend thousands on a mega SS preamp, try a tube preamp, even a moderately priced piece could give you what you want. The lush and charming sound is the icing on the cake.