Great choice. I've been running several of the CCi44 amps and have been extremely happy with them. Good, clean, low-noise power!
Do keep them well ventilated, tho'. I would consider adding a few of the really quiet computer case fans in a push/pull configuration.
In one of my systems, one CCi44 is powering the front stage mids & tweeters, while the other one is bridged to the front midbass drivers.
In that system I'm also running one of the Biketronics BT2700 amps to power Four 4-ohm subwoofers, each pair wired in parallel to each channel.
I've been extremely happy with both the DLS and the Biketronics.
In other installs I'm using several of the other Biketronics multi-channel amps and am more than pleased!
They are obviously incredibly compact and powerful for their size, crystal clear, with an extremely low noise floor.
I wouldn't hesitate to put them up against ANY of the higher-end Class AB amps I've used.
And 90% of all of my installs are "stealth" and purely utilitarian, where I'm not "showing off" any of the gear, so the cosmetics really don't matter to me.
Not that I think they are ugly, but being so small and somewhat "bland", they just don't look "impressive" or WOW you with their looks.
But IMO&E, they are some of the best-performing amps you can get. Not cheap, but considering their size/power/performance/efficiency, I don't think you can currently do any better.
If you could go with the Ncore module Vivid Amp line, I would say that you're pretty much at the End Game level.
Unfortunately, for both the Ncore & UcD based amps, the power options are a bit limited.
I'd like to have some options for a bit less power while keeping all of their other attributes...ideally a staggered-power 6-channel...though it's really not a problem to lower the output level from your DSP to control the input gain on the current BT6180.
The main issue with the somewhat boutique Biketronics amps is their lack of off-the-shelf availability at any given time, but especially during the summer cruiser bike season.
While Mike and his team at Biketronics are AWESOME, it can literally take months to get what you want.
But if you can hold out and the amps meet the power & channel requirements of your system setup, they are definitely worth the wait.