Okay so I'm saving up for my stereo and I have a few rough ideas.

First step will be Pioneer Avic-D3, 2 ED (10" underseat)stealth boxes and an ED Nine 2 amp.

Second step will be to upgrade the in car speakers working from the front to the back. This is going to be a little later on, most likely winter, and I have no clue what to put in for the best sound.



Now my questions:
The stealth boxes will fit under both seats correct?

Also, what speakers would you guys recommend to use as replacements for the factory ones, and if I upgrade those, will I need a stronger amp? If I will, I should just get it right away.

Thanks guys and girls.

 

Go with the eDi6500s to replace the factory speakers. They are absolutely mind blowing! However, If you don't want to shell out the money for them, the eDi6000s are also an amazing set of components!
I had the 6000s and they were awesome! I would've kept them, but I ended up getting an insane deal on the 6500s.
I would highly recommend using an amp for your aftermarket speakers.
I use a NINe.2 with the components, and that is what I would recommend to you.
I also have (2) 13Kv.2s with a NINe.2x. It is the perfect system for my musical tastes. I've had alot of systems in my previous cars, and none can compare to the output and sound quality of Elemental Designs. They come highly recommended!

Yes, stealth boxes will fit under the seats.

Here is the link for the eDi Components: http://www.edesignaudio.com/edv2/index.php?cPath=1_23