I can't speak to the Rotel or Anthem line myself, but I do have experience with B&K and Sunfire products. I recently purchased a Sunfire Cinema Grand Signature Amp and the Sunfire TGII. I still have not come up with a final opinion on the TGII vs. B&K Ref 30 which I have also used. I am quite happy with the TGII as a movie processor, I do not use it as a pre for my 2 channel listening.(I use an ARC SP 9mkII). The TGII has a wealth of inputs and outputs, great video switching, a good bass management program, and I personally prefer it's looks over the Ref 30.
What I prefer with the TGII/Cinema Grand Signature combo is the ability to connect the two via a full set of balanced cables, which IMHO results in an overall lower noise floor and less chance of RFI.
My speakers are very revealing of anything in the chain ahead of them, making bad source material sound worse, and pointing out flaws in weaker link components upstream. (Magnepan MGIIIA w/modified external XO)
The Cinema Grand Signature amp is a powerhouse SS amp. It gives you the opportunity of using two different taps: Current Source and Voltage Source. Magnepan speakers are very power hungry and can take whatever in the way of clean watts you throw at them. At 405 watts x 5 channels, it's a good mate for the Maggies. The current source tap is said to be more "tube like" than voltage source but has the side effect of running very hot at full tilt, pulling about 15 amps.
Both Sunfire pieces are big in size and the amp requires good ventilation as the heat is expelled from the bottom plate of the amp.
Sorry for the long ramble - but if I had to choose between the B&K and the Sunfire again, I would still choose Sunfire.
I haven't fully resolved my final opinion on the processor, but I can say hands down that the CG Signature amp is a GREAT HT product, and a damn fine 2 channel amp as well. I think it may be underated by a lot of people.
