Excite bookshelf + subs sounds good to me.
I would NOT worry about external amps with any of these speaker lines unless you are listening to crazy high volume.
For example, the Focus 160 is 4 ohms/ 85dB/2.83V/m, which is similar to my KEF 201/2 & ATC SCM7 bookshelf speakers. Yet, a Denon 3312 has not problems at all powering these speakers.
With a sensitivity of 85dB, a distance of 4.2 meters (14ft), and peak volume of 94dB from both speakers in 2.0 direct mode (91dB from a single speaker), the required power is 70 watts.
I consider peak 94dB from 4 meters in 2.0 mode to be very loud.
The Anthem 700 can output 221 WPC x 2CH into 4 ohms. No problems at all.