I am looking at upgrading my speakers to JBL and am undecided between the N38 and the ND310. Any opinions on iether speaker and to why you would choose one over the other would be great. Also, I know that you are supposed to voice match the center and the two fronts and I have seen many posts on here about not mixing the s-series center with the n-series speakers. However, the s-series center has the same midrange as the two n-series speakers mentioned above and it is my understanding that much of the dialog and such is played through the mids. So would mixing the two be that noticable with the only difference being the one inch tweeter vs. the 3/4 inch tweeter?