The Mini monitor / CC-370 is a great choice. I used to have that exact set up before my last upgrade and I really liked the performance they put out.
As far as the difference between the 7's and the 20's it's pretty big to me. The 20's image MUCH better and have just a cleaner sound to them. They also put up a wider sound stage.
For HT use you won't really hear much difference between the 7's and the Mini-monitors...so if your on a budget stick with the Minis and then when your ready just jump to the Studio line if that's what your leaning towards......or if your like me....bypass the paradigms alltogether and move to Swans!!!
