Check out some stereo Brystons if you want to get close to your budget maximum. The only time I've heard Totems was with a Bryston, and it sounded gorgeous. Putting the Brystons on the fronts will definitely free up the receiver to give even more power to those other speakers (though that Arcam should be good enough as it is).
If you wanted a multichannel amp, a used Sunfire should be in your range. Good luck!
If you wanted a multichannel amp, a used Sunfire should be in your range. Good luck!