So I'm guessing it would be a pretty nice setup //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif
But i do have to agree though Nightshades are a good way to go, but if the OP isn't gonna be upgrading his alt then I definitely wouldn't run 3500+ watts on a 105amp stock alt. Especially since it sounds like he has either none or very little experience with installs and higher power ones aren't the easiest to learn with(also are much more expensive).
Something like a single 18" Nightshade or 2 15" DC LVL4s off a Sundown 2000D. Either setup would laugh at the power, yet still get loud and with a couple big batts the voltage drops shouldn't be too bad.
Btw OP its a Sundown Audio Nightshade, just google Sundown Audio and check out their site.