Mc2105/2125/2205 vs mc7106 for 2ch/ht set up?

Hi all,I'm very new to this. I'm putting together a rig for both stereo and home theater. I'm mostly interested in 2 ch but want to play some 5.1 blu rays as well. I have a mc2105 and mc2125, sholi just add a mc2505 or do you think it out be better to just go with a 6 channel mc7106. All will be paired with a c39 or mx130. In desperate need of opinions ...