Objectively speaking, I like the alteeza lights...I would like them a whole lot more if they weren't used by so many rice burners. As a result, they look so young because I see so many kids driving cars with those lights.
I am an old fart in my mid 30's. My stang is a third car...just a hoby. The tail lights really aren't me, but you are a young guy. Also, the newer stang tail lights are kind of retro. They look like those from the '65 Stang. When I was a kid, I remember that car vividly (see, I am old). For that reason, I have left them on my car. I would prefer to put the money under the hood.
One great thing about stangs is that the sky is the limit. There is a huge market out there for this kind of stuff.
Check out this web site:
www.mustangworld.com
It is really an awesome website. Lots of photos of cars and be sure to scroll down and look on the right for all of the "How To" articles. There is tons of stuff on how to make changes to your stang...many are free. Great website for cool ideas.