It does not seem to matter what cart I try out on my Garrard I keep coming back to the same one as having the best overall balance of detail, bass, soundstage and presentation.
My good old faithful Nagaoka MP-150.
Not even expensive by any means but it sure does rock on my Garrard 401 and Micro Seiki 505ls tonearm combo.
Of course all my carts are sub $1000 units ATM.
Maybe I need reach higher......