I've been doing the whirlpooling thing lately, but I'm not positive that it's necessarily much better than flameout & dry hopping alone. Actually if memory serves, I did whirlpooling without flameout on my last batch. Plenty of hop flavor and aroma, but like I said, not sure if I might have gotten the same results with just "regular" flameout instead of whirlpool. Meanwhile, nothing can replace dry hopping, which I'd always use in an IPA. For APA though I might skip dry hopping (personally) and only do flameout or whirlpool, one or the other, probably don't need to do both.