i have a g35xs with the nav and premuim package. i got 2 jl 10w6's for real cheap and a jl 1000 1v2 to go with them. but heres the thing i wanna keep the stock head unit ( which i know can be done) but i also want to keep the bose speakers since they are good speakers will the subs over power the speakers and make it sound like **** or will it be fine

 

They will be okay but you might wanna just pick up a 300/4 and some decent midrange speakers. I am running two 12W6v2's and a 1000/1. Previously I had the stock headunit and sounded okay. I then switched to a 300/4 and Boston Acoustics setup and it sounded better still on the stock headunit. Being I didnt wanna hack my Navi I just broke down and did an Alpine head unit.

 

The Bose speakers and amp can't be described as good and yes, your 1000 watt amp driving 2 subs will probably drown out the Blows amp and speakers unless you turn the gain down.

 

im running 1000/1 Jl amp and 12inch W7 sub with stock speakers it doesnt sound so bad but i would definitely upgraded the speakers

 

Might want to just run a a new amp to the stock speakers. I did that in my Accord and it was a huge difference, although originally it was running off the head unit. I went ghetto about it. Wired up 6 speakers to a 2 channel amp. Had no issues, got plenty loud, did what I needed for the meantime.

If you wanna go the cheapest and easiest way about doing things, first, install the amps and subs and see how it is for yourself. If you feel it's drowning out the music too much for your tastes, then do something about it. You can get a pair of coaxials for the front and hook those up to an amp. I wouldn't touch the rear speakers as they are fill. You can leave them hooked up or disconnect them.