Per the Bass hump, of course, you can never get perfect sound in a bad room, but some careful moving will minimize the bass problems. Try listening to one speaker at a time, in an assemetrical room, chances are, it is coming from one speaker. Try Left and right until you find the speaker causing the boom, then move it until it sounds better, then position the other speaker as necessary, then listen to only that speaker, get it right, adjust the first speaker- hey no one said is was easy...
As far as I can suggest otherwise, I had the SR-1 Unison Research integrated amp. Basically the same thing, but it looks TONS more "Italian" than the Unico. Good sound, really good for the money.
I've heard the Cambridge described as "airy", and they seem to be great for fairly inexpensive CD players. That might be some of the difference.
I doubt that the Roted with outboard DAC is worse, though, but probably different.
Please, No offense at this comment, but you didn't mention Interconnects, which can really, really affect sound. I used Topaz and Opal in the Old line, and you should be able to get these cheap used. Opal was a really, really awesome cable. Smooth, Airy, and fast, with good bass. Topaz was a bit fuzzier by comparison. Viper in the new line is Better than Opal. I'm using Python currently. While I am a loyal Audioquest user, the type 4 is really, really bad. Now, I still have my pair of type 4, so don't get mad, it was my first "real" set of speaker cables, but it's time to get those out of there.
I went from type 4 to Indigo (better, but not night and day, to the Midnight (nice sounding cable, and you can find it rather cheap now- it uses the good copper in Audioquest's now discontinued line) Be sure to get the latest, I think it is Midnight III, but not sure. From there I went to SA-40, which is an all silver cable. Expensive but awesome.
Anyway, since you've come this far, I'd really consider trying some better cables.
As far as Audioquest is concerned, the FPC (functionally perfect copper), and FPC 6 (99.9999% pure copper) is great sounding, and was used in their top end old cables-Midnight, Clear, Sterling, etc. NOW they use PSC (perfect surface copper)in their better cables, and they also raised the prices.
But, I've used the type 4, and there is not much air that will get through there.
Anyway, just my $0.02, good luck, and don't "loose" hope.