Matchups for Mordaunt-Short speakers?

Anybody have experience with these speakers? I have a pair of Mordaunt-Short Pearl 20i speakers and am looking for a good SS integrated amp to match them to, $1K or under, with my Rega Planet CD player. Unfortunately the Rega Mira amplifier was NOT a good match, too tubby and constricted with these speakers. I am currently using a vintage Marantz SS Special Edition integrated amp which gives me a warm sound with an impressively extended soundstage, but not as much detail as I would like. Suggestions?