Not sure about top tier, but in my system the Manley Steelhead has stood out above the rest. After it, in order, I like the...
Simaudio LP5.3 & PSX5.3 combo
BAT VK-P10se
ASR Basis Exclusive
Ayre P-5XE
Simaudio LP5.3 & PSX5.3 combo
BAT VK-P10se
ASR Basis Exclusive
Ayre P-5XE