streaming movies

I'm trying to decide on hdtv and blu-ray to purchase. This option
seems to be a factor in my decision but i'm not real sure. 1 brand
does amazon and the other netflix among others. Wouldn't a dedicated
htpc or some other device be able to stream both? Also i would have
to up my cable internet service $15 more per month to get the speed
for streaming movies. Right now i'm paying $39 a month. This is cox
cable. Probably would have to get an "n" router as well. Don't know
if my "g" router would be good enough. Weighing all this stuff out
before i make a purchase. No plans on a htpc right now. How's the
quality of streaming. Right now i have all the premium channels which
adds up. It seems i would get newer releases from netflix and i'm
looking at the bottom plan around $9 a month for 1 dvd out and
streaming. Any advice would be much appreciated.