Tube Amp for ProAc Tablett 2000

Hi, I'm building up a 2nd system and I'm left with Proac Tablett 2000 and Naim cd5i. For the 2nd system it would be purely on jazz & vocal. Appreciate any advice on a modest integrated tube amp around 600/700 GBP. Tried Primaluna Prologue One and Rogers E20a but i think it doesn't match the speaker. It sounded too lean. The interconnet used is Nordost Blue Heaven and NAC5 speaker cable.