Second the recommendation for the Quads with the Marantz. The slightly warmer, laid-back sound of the 7001 will be balanced by the neutral, slightly dry delivery of the Quads.
If you prefer a more laid-back sound, the wharfedales (9 series) will complement it. the 9.5,9.6 will sound bass-heavy with the amp since the 7001 has a strong low-end presence, though slightly fuzzy. You may have to move the speakers substantially from the walls or tone down the bass if your tastes are not bass-heavy.
Energy also has speakers whose sound will match the Marantz. I have never heard the MA or MS range, so can't comment. First decide what your sound preferences are (warm, laid-back, neutral, bright) and choose combination accordingly.