If you are going to run a subwoofer (of any size) consider looking at the Boston speakers. I posted the models I was using (
http://www.syty.net/phpBB2/viewtopic.php?t=17436&highlight=boston) for the front. The 6x9 rears I used obviously won't fit (I have a Ty, you have a Sy) but maybe Boston makes some 4x10's that do. Might be worth looking at.
I got the Bostons because they had a very clear, crisp sound, but did NOT try to reproduce bass. I like this because I am running my speakers off my deck (a Sony MP3 BTW) and did not want a little 4x6 trying to produce the deep, distorted bass most speakers try to make. Instead, I added an Infinity powered sub, which compliments the system very well.
The speakers themselves did not fit in perfectly. What I had to do was trim down the "plus" shaped tabs on the speaker grille posts. I simply used a set of wire cutters to trim these 4 little pieces of plastic off the post. By doing this, it allws the speaker to slide all the way up flush to the grille. At that point the speakers drop in with no further modification. However, I had to rotate the speaker over the glove box to get it to fit (so they both have the tweeter on the left, the speaker on the right) which means the "imaging" is not super-competition perfect. Can I tell? Nope. The only problem with my set up is that the grilles in the dash bulge up a little bit. Not much, and not more than any ten-year-old truck might already do.
Anyway, if you are not getting a sub, well, god help you, because the speaker setup in these trucks sucks for low frequency reproduction.
