Sometimes very simple room treatment can very efficient as well especially for echo. Do not neglect this solution. The TacT RCS are however very effective in the low freq were room treatement is very difficult to achieve. In your case, for home cinema you would put the RCS between the 568 and your amp, the RCS is in fact a preamp and for stereo 2 channels you can directly go from the 598 to the RCS (bypassing the 568), you can have both in parallel, use digital input of the 2.2x for input from the 598 and use the 2.2x volume control, for home cinema, set the 2.2x to unity gain and tune the volume on the 568 (use the analog out of the 568). That's what I am doing at the moment but not with Meridian gears.

The best place to find info about TacT: http://groups.yahoo.com/group/TacTAudioUsersGroup/

Hope this helps.

Michel