I believe its mostly all personal preference. If you got the $$$ and bling bling to ya.

if not, stick with what you can afford.

HP gains is so over rated these days.

does 1 or 2 more matter? can you honestly feel the extra 1-2 HP gain? I doubt it.

Research and see what is best for you and your budget.

despite all types of upgrades, tuning is the key. that is your true HP gain right there.