dude can you link us to somewhere to get the front speaker covers off? i tried prying it off, but it doesnt seem like thats the way its done.
and no, the tweets are on a separate channel, swapping the front 6.5 wont affect the tweets. while youre at it, switch out the rear 6x9! theyre super-easy to access, unlike the front ones, in my experience!
I went Alpine-S, They arent the nicest Alpines and I overpayed for mine, I believe 200 for all 4. You can get em online for probably 120 for all 4(fronts and backs) but I'm impatient. I did a whole DIY. Here ~~
The tweeters are run off the same wires as the front speakers, so if you replace the front speakers the tweeters will still work. However, you may want to play around with taking them out. Due to the different sensitivity of the aftermarket speakers compared to the factory speakers, they may seem a bit bright and may not interact with your new speakers to well. I had to pull my tweeters because they were way too loud compared to my aftermaket speakers and they were also causing phase issues which lead to poor imaging of the music. The left to right sounds were getting very mixed up and the midrange was getting lost. Took them out and it cleaned up the sound and imaging a lot.
i changed all my speakers to infinity reference and amped all of em. it just isnt worth it to change the tweeters in my opinion. it takes waaay too much time and effort to run the wires for the tweeters plus my tweeters are too sharp for my ears when i turn it up loud. i think the stock tweeters are fine.
to get signal to the amp i just used a line out converter and tapped into the rear 6x9's. sound quality wise isnt as good as rca's. if i were to do it all over again i would just go with the alpine type r's and leave the tweeters alone.