Upgrade Krell KRC-3

I am currently using a Krell KRC-3 pre-amp feeding a Gamut D200 MkIII into a pair of Tannoy TD12s. As the Krell is old I am looking to upgrade and get a more 'human' sound. Trouble is I don't know how good the Krell is compared to modern preamps. Where would you pitch a Krell against todays preamps and what would put some clear air between it and them?

Thanks for any advice/help. I live in the UK so some makes ain't available.