I just feel that's overkill for your setup. The difference between the M7/M10 and the NFB-27/SA-300 is close to zero IMO (both are ultra high fidelity), but the difference between your Vizio (I own Vizio's) and that Panasonic I mentioned would be much more noticed. Awesome sound, awesome picture or awesome sound, decent picture as I see it.
Just wondering.. have you heard both combo's? or is this based on specs? the reason why I ask this is because on paper, speaker cables do not make any difference as well.. but to me it made a good differece. Hope you are not offended, just wondering if you had heard both combo's.. If you did, I'd definately go the route you suggested and pick up a better T.V! Thanks again!