Car Enthusiasts only! Still can't decide what to buy?

Well for starters I'm 22 years old and I'm in the Navy. I still drive my 2007 Grand Prix that I've owned since I was 18. My income is pretty steady and I'm not looking to go all out anytime soon cause I'm still saving money over the next year along with the money I made over the past 2 years working as a restaurant manager so I can pay it off quick. I'm the kind of guy that loves both muscle cars and imports but still trying to find the best and reliable car. I also want something that's easy to modify.
So far I've considered the following:
-2010 Dodge Challenger R/T
-2012 Mustang GT
-AP2 Honda S2000
-Nissan 350Z
-Scion FR-S
-2008 BMW 335i
I'm also thinking about trading in my Nighthawk for an 08 Ninja 650R, Honda CBR600rr, or a Yamaha R6.
I own both my car and bike so I don't make payments on either one of my vehicles or anything like that.

2012 Mustang GT

Save the $30-40K…
Lincoln Mark 8 LSC… Cheap, luxury sport, rides better than the GP, 300hp out the box. Cheaper to insure, high sleeper factor.

Study study study. Only you can decide what you like the best. My choice is the Dodge

Evo X or '15 sti. You won't regret it!

If you don't know what you want, how am i to know lmao