The LS is a great value and still a kick in the pants to drive. You've got 312hp and with an intake and and exhaust upgrade you can probably get at least another 10hp. I love mine and right now can't think of why I would need an SS. Now if I came into some money I would have both and save the SS for my weekend driver.
Ultimately its your dime and has to fit your needs but if you want a Camaro you will NOT be disappointed with the V6.