Marty, John is absolutely correct about the balanced design of the LS2B being half baked. The device has XLR and RCA outputs, but only RCA inputs. The XLR outputs are using some kind of technical alamagoosa to fake the balanced signal. . . . and regardless whether its sound were 'pleasing' or not, it does lack the phonostage you are seeking.
I have replaced my LS2B January last with an ARC Ref 3.
I have had only experience with the 4004 Mk. 2 in the Mondial lineup. While it is a competent unit, better than the Bedini, Hafler and PS Audio I had the opportunity of auditioning at that time, it is fuzzy and unmusical, when you compare it to top ranking brands of the same period. If you were looking for a solid state amp of the mid to late 80s vintage, I would suggest 1st or 2nd generation Rowland monoblocks. price point will not be staggeringly higher than Aragon 4004, but you would find yourself musically in a different world all together.