What's a better choice? Manley Steelhead Phono or Audio Research Reference 2SE Phono?

Steelhead has 3 pairs of phono inputs, not just 2.  If that matters.  If balanced output is important to you, I would check whether the AR unit has a true balanced output or just a balanced out derived from its inherently SE circuitry.  In the latter case, the balanced outputs may actually be inferior to the SE outputs, for absolute fidelity.

Which one do you like the looks of better?

Well the deed is done!  I have sold my Manley and bought a REF 2se I pick it up Sunday...I have had many, many enjoyable years with the Steelhead I just think I have maxed out my Utility with it.  I have to say I am a bit nervous because of the unknown with the AR BUT I do believe that Synergy will be the tip in the right direction.  I do use Balanced Out's and the AR is a fully balanced design and I will say the Steel head is errrr....was the only piece of gear I had left single ended.  Now we shall see if my Cart(s) like the AR as much as my Steelhead! I really do appreciate the varied opinions and ideas I get from fellow enthusiasts! 

Old post but just noticed I have been enjoying my Ref2se but was curious what you think now that you made change.

@rikintpa what were your impressions on Steelhead vs ARC REF 2SE?