im thinking about going with:

2 JL 12w6v2
1 JL 1/1000 amp

and i was wondering if it would cause any light dimming or anything of that sort.. would it be fine to run with just the stock electrical system? i have aftermarket HIDs(XD 8000k) already installed.. would it make any difference? i drive a 06 is250

 

if you are concerned, upgrade the "big 3". It can be explained better/further here:
http://www.caraudio.com/forum/showthread.php?t=152355

 

That is an excellent thread. The part about removing the paint underneath the bolt or screw is very important. I have yet to do the positive to alternator due to a spacing issue in my RX300 (they are on opposite sides), but using the Sun Hypergrounding system, I was able to get the 2 of the big 3. There is definitely an improvement, including in throttle response.