I do wonder if the Beolab 5000 might actually accentuate the brightness of the Soundsmith cartridges. It always seems a very lively amplifier - I might use the 4401 as this always seems the most neutral of my collection.
That's why I took the Beogram to a friend's place for a comparison run, as mentioned in the review - wanted to check with another amplifier/speakers. Still had the telling brightness. Was fun to compare the cartridges!