A21SE vs Supernait 3 vs Eci 6 mkII

Hi,

I'm kinda undecided on which amp to choose of the 3. I have an opportunity to audition the Supernait and Eci 6 mk ii separately but I haven't heard the Sugden A21se Signature. Any thoughts on which will be best? I like an amp that has good timing on bass and good extensions on the highs. Thanks