Upgrading to new, utilizing old VSX 915, need advice.

I'm a newb (audiotard, videotard) with a butt load of questions. I'm searching around the forums learning as much as possible but need some input on a couple of things I can't find.

I've recently moved and brought along a Pioneer VSX-915 receiver from my old system. The speakers and flat screen were in-wall so I left them. I have a Boston Acoustics Sub and a couple of DVD players, non-HDMI and one Samsung DVD R155 player/recorder. I bought a new screen for what will be a dedicated TV room (carpeted bonus room 15X17 or so) where I want to get a nice BluRay player and new surround sound receiver and speakers. (Lots of questions to answer there but first...)

The Pioneer seems to be a good receiver but with no HDMI and it being around 5 years old I feel I would be better served in the TV room to updgrade. Maybe the Onkyo 607 or Denon 1610, haven't decided. My first question is how to best utilize my existing receiver for another need. I have a family room, 20X20 with very tall ceilings, where I'd like to have a couple of speakers and the BA sub to provide background music. I'm limited on options for speaker placement (yes, my wife is the primary limiter) to a couple of built in cabinets on each side of a fireplace. I can run wire underneath the floor from a closet where I will house the receiver, wireless modem/router, UHF remote etc. but am unsure where on the receiver to hook up just the two speakers for best sound.

So question one is just that, where do I tie into the 915 to provide stereo sound to a couple of book shelf speakers? I'm assuming front but don't know for sure.

Also, for the Sub, it's about 25 feet from the closet/receiver. Will coax work with the proper adapter at the receiver or should I use the sub cables I see advertised?

Here's a link to the receiver.

Oops, it wouldn't let me post the URL cause I'm a N00b. There's a pic of the back of the receiver at plasma dot com under pioneersound and vsx915 if it's needed.

As I said before I have a lot of other questions but am still trying to find answers from other posts first.

Thanks in advance for any suggestions, on any of it!

Wow, 50 views and not a single reply. Maybe I was too long winded.

I know they're pretty stupid questions but you would think somebody would at least call me a moron. No wait, I can see that one coming.

Just tell me a better way to get input and I'm game.

Thanks Jettore.

As for the idea on the zone 2 pre out, I'm assuming the two would have to be reasonably close to wire them together(?), so it may not be possible. The room I'm using as our TV room is upstairs and several walls away from the downstairs family room.

As for the book shelf speakers, I've looked at the following and would appreciate any input or thoughts.

Axiom M2 or M3.
NHT Classic Two.
EMP Impression E5bi.
Orb Audio
Klipsch Icon or Silvertone Minuet (a bit more than I'd like to spend)

Most of these I've just read about here as recommendations on other posts. The $300 per pair range is most comfortable but I could be convinced to spend more if it made a big difference. Any others I should look at?

Thanks again for your response.

The RC mini's seem to be rear ported. I like what I've read about them, do you still think they would be the best choice? Plug the port?

Thanks.

Interesting. I'll keep them as an option. I'd like to order a pair ASAP and get it going.