either way - do what you want to your car - ultimately, you are the one paying the bills, not others...
if you want the hood first, go for the hood first - you may look at it and see that everything flows nicely to your tastes... or you could look at it and agree with needing needing a kit, drop and wheels for your car
...or you might just decide after you have the hood installed to your car, its not your style anymore and you want to go for more race and just leave your car looking bone-stock and spend your money on more Performance modifications
the hood you've chosen might also flow well with the correct graphics scheme (aha!! no body kit needed
)
these are a few different directions to head in... its your choice what you choose to do though - don't let others tell you how to spend your money, and push you into driving a car design that you really would rather not have...
I personally like the "STOCK" look and may be headed back in the direction soon
Best of luck on whatever you choose