As for removing the glove box is easy.
then look for a hole already going thru your firewall and use that one.
What size wire did you run already?
What size amp do you plan on using? ( watts )
((Example a 4 guage size wire will handle up to 1400 watts to a single amp.))
I recommend a 4 guage wire for any thing lease then 1400 watt amp.
You will not have trouble with the resistance to your amp with that size wire.
As for great set of Subs and amp look here.
http://cgi.ebay.com/ebaymotors/ws/eB...940489461&rd=1
I hope this helps, Don't use that wire that comes with that amp speaker kit,learn from my mistakes. I fryed my Alternator. :eekno: Upgrade your battery too.