I have a Sony str dg800, Standard receiver with 7.1 capablities. I have a 5.1 set of polk audio rm6750's, and an extra subwoofer. my room is currently set up 5.1 , i have some gift cards and money to upgrade either my 5.1 to a 7.1 or even a 6.1, or i can upgrade my reciever for one that has dolby digital tru hd, and dts hd and master. So i guess my question is which will be a better use of my money? which will make the biggest impact, does a person notice the diffeference in the sound fields, or not worry about expanding my speakers setup espcially being most movies don't even use 7.1? Please feed me help or opinions. thanks
