Alright, so a friend of my dad's gave me a set of boston acoustic 6x9's when he was moving. Cool, I thought.. Searched around here figured out how to get to the speakers, pulled the seat out and all, and installed the speakers, left was blown.. so now I see why he just gave them to me (how nice).
I decided after doing the work, getting to the speakers and all, I'd just buy some. So I shopped around, ended up ordering some 6x9 Rockford Fosgate Punch speakers (P1694C). I decided I wanted something more up front too, and I had read I could put in the 6.5's so I ordered 6.5" Infinity Reference Component system (6020cs).
I'm wondering how much I'll have to do to get the 6.5" in? Is there a write-up or anything, or will it be pretty simple?

Also I'm going to add a head unit, but I'm not sure which yet, I want something that should power these speakers fairly well, also ipod connection(aux) would be nice. I think I might add an amp, and a sub or two in the future as well.. Oh, and I'm hoping to spend not much more than $100-150 on the head unit if possible.
With the head unit, since we have a din and a half slot, I was searching around for a nice flushmount adapter, and I found the lit Grand Prix one(humount.com), but I can't get the site to work?.. Is it down or something?.
(Noticed on their main page just now: - "Please note that we will be closed from Aug 8 to Aug 23").. Does anyone know of another place?
Any other advice is welcome, thanks a lot.