Rotel 1075 5-Channel + Rotel 1068 pre/processor

I've struggled with these same concerns. I own Rotel 1066 processor and 1075 amplifier on B&W speakers. I haven't replaced power cords, but did upgrade speaker cable and interconnects hoping to increase bass response. It helped, but never to a level that compared with good 2 channel components. I turned the bass tone control up to +4 on the Rotel, and now I'm satisfied with the way HT sources sound, but still not 2 channel.
I've experimented with integrating a separate 2-channel pre-amp into my HT setup, and that yielded some very good results (and also made me want a better amp). To integrate a separate pre-amp, you would hook up the main outputs from your Rotel into a HT bypass input on the 2-channel pre-amp. Then the outputs from the 2 channel pre-amp go to the inputs on the amplifier. Any two-channel source would be hooked up to the inputs on the better sounding pre-amp.

Good luck. For me, I'm leaning towards two separate systems. One for HT, and one for stereo.

Thank you for all your responses. I think I'm more confused about everything now than before. My previous two channel set up consisted of the Classe Seventy amp paired with the Classe Four preamp (a bit dated but still good). I was originally going to sell the Classe equipment, but after hearing the newly acquired Rotels, as I mentioned earlier, I'm a bit disappointed, especially with the two channel stereo bass response (non-existent!). So if I decide to keep the Classe equipment, how do I incorporate it into my Rotel equipment? I tried to follow what the last posting recommended (incorporating the pre-amp into my Rotel, but got lost on exactly how to hook it up...Or should I try hooking the two channel classe into the 1068 Rotel processor for the front speakers? If so...how do I do that? I originally had wanted to add a new power cord. A previous post had recommended Signal powercords. Upon closer inspection, the Rotel equipment only takes a TWO PRONGED North American cord. Now I feel like I've bought the wrong equipment; what decent stereo manufacturer only uses TWO pronged power cords??????. *sigh* Does anyone make a decent two pronged power cord? In the end, the VERY last thing I want to do is have two separate systems...one for HT and the other for strictly music. ANY and all advice is greatly appreciated!

Ive gone thru the same basic issue, as I have a 1066 and 1075 combo. I have added or changed out eveything, IC's, power cords, power conditioner, etc. The biggest thing I did was to add a two channel amp for the front mains. First I had a 991, 200 X 2, and that helped out with what your looking for quite a bit. More punch and better bass, no doubt. Then I came across a 1090 amp, and that was it. I have to take out the sub when listening to two channel music.
As for the power cord issue, when i brought the 1090 home, I had the dreaded ground loop hum. I did eveything you were supposed to do to get rid of it, and it was still there, albeit to kind of a minimum. My buddy told me to clip the ground plug. I did, and that was all she wrote, it was gone forever.
As for the classe preamp, its better for sure, I did a borrow / sound check against my Rotel, but I have since made upgrades to compensate. Doubled up my main speaker wires.
Its been a long road, and Im not quite in two channel heaven just yet, but I am totally happy with the HT aspect, as I can shake a little plaster off the wall if I want to.
Try adding another amp for the front mains, you wont believe the difference.