Torn between 360 or 408 .. Advice??

Alright ! Lets do the 408 ! Whats the best one for the money ??? Got to cut costs here a little bit. I've seen them for $895 and up what am I looking for. Ok Tell me where and next the question is :
I buy a balanced rotating assembly right? Then I use a 340 harmonic balancer & Flywheel cause the engine is internally balanced?? Am I thinking right?? This is all new territory for me so I got to see it all.