Gonna be honest here, I don't personally like any of the locations, with those speakers - I just think it looks all wrong (or it could just be a jealous streak coming through because you have tunes in your ride and I am still without). I am not a big fan of speakers like that, it almost reminds me of being in High School and putting the home theater speakers in the back seat. If you are dead set on using one of those options, then option 1 is the lesser of all the evils. I am not sure what the budget is on the project but have you thought about using the Tuffy front speaker box?
http://www.tuffyproducts.com/speaker/065.html If you don't want to actually buy it, I am sure that after looking at the box you could probably home fabricate something like it.
Just my 2 copper pieces.
dan