Brand New With A Few ?'s???

[BrettLee3232]

Hello,
I been scanning this forum for a long time now & learned alot....my roomates & i recently built a house & before becoming a fireman i was an electrician....so i got to wire our house & customize it with lights & sound haha anyways in our living room we have a custom built entertainment center built out of wood & we drywalled it so it matches the walls.......we have a 47" LCD mounted & all the componets in a designated place underneath the tv......the way it was framed i had to run the wires before the drywall. Back in the day (1 year ago) i was told all i needed was Componet cables no HDMI.......so i ran 2 sets of componet cables. Now owning a Blu Ray i realize i wish i would of ran HDMI....so i have a few questions.


1. I have to open up the drywall to run more wires.......should i run HDMI cables?

2. How do i have game systems hooked up to the TV so i can have sound from TV but when need play sound through stereo?

3. I have 5.1 stereo with 2 sets of in cieling speakers & 1 in wall center channel. My sub is directly side by side to all my equipment....is it bad to have my sub there? Should i run my sub somewhere else?

4. I was thinking about upgrading to 7.1 & was planning on putting 2 in wall speakers in.......is it worth it to upgrade?

5. we have Phoenix Gold in-cieling speakers wich sound great & a yamaha Center wich sounds great.......i was thinking of ordering the Monoprice.com in wall speakers if i decided to go 7.1. Has anyone used/heard them?

i know it would be easier to see with pics so i will post soon. But for knowledge i have a 7.1 yamaha reciever.........thanks again!!!!!!!