i am trying to decide on which A/V receiver to buy and since i have never owned high end stereo equipment the choices are overwhelming

it seems the manufacturers i have researched (onkyo, marantz, denon, pioneer) all have an aprox $2K model and a $1K-$1.5K models ..... and i simply cannot tell the major difference between them other than the more expensive versions seem to have a little more power, higher end decoding options, and a few more connections

i am assuming that like everything else once you hit a certain quality level, the relationship between price and features stops being linear ....but i don't know where that thresh-hold is with AVRs .....is there a huge difference in going from $500 model to $1k model? from $1K model to $2K model?


here are the things i think i want to have
-at least 100W ...(if i understand correctly my real watts would be 100W/# of channels)
-i can go as low as 5.1 channel
-Dolby TrueHD or DTS-HD
-i have an HDTV and blu-ray so i understand that i want HDMI connections to get the max out of my DVDs
-i want to be able to get free internet radio on the AVR
-receiver can wirelessly read music from my non-Apple laptop
-i can plug in a flash drive through a USB port
-keep the option to upgrade later buy buying a separate power amp

things i am not sure about
-what is "upscaling"?
-is HDMI superior to Svideo and component video or are these different things?

thanks in advance, Mike