Integrated Amp advice please someone help me

Hi.

I'm in deep "analysis paralysis" and can't seem to pull the trigger on a new integrated amp. Would love to hear your opinions... i'd like to spend no more than $700...

I'm considering:

Creek 4330 (used)
Arcam a65plus (new)
Rotel RA-02 (new)
Musical Fidelity A3 (Kevin @upscale sez a good match and he's selling em' for $850. a bit too rich for my blood though)
Roksan Caspian (used)
Audio Refinement Complete (if i can find one used)

My system now:
NAD 3020a (old, ailing, on its last leg)
Ah! Njoe Tjoeb CDP (brand new)
Clarity Labs Emberglow ICs
Beovox s45 speakers (From the 70s, soon to upgrade)\

thankyouthankyouthankyouthankyou

(i listen to every concievable kind of music. Ideally i'd love to achieve a significant improvement over the NAD)