If the Whomper seeks Bass and imaging, then the WS1100iS is a great pick, and I’d recommend it slightly over the Alphas if you can deal with the lack of isolation! It has a semi-open design, which helps with soundstage, and it has Audio-Technica’s signature slightly sharp upper midrange, which helps produce a strong sense of imaging.
The Alpha does both of these things just fine, just not quite as obviously as the Audio-Technica pair does. And it of course has the advantage of the gaming microphone, so if you ever need that, then the Alpha remains a compelling pick.
My little shopping secret is that I always try to maximize my personal price/value curve. I think “Will I use all of the features here? Is it the cheapest one I’m looking at?” If the answer to both questions is yes, I go for it, because there’s a very low chance of being unsatisfied.
There’s almost a gazillion headphones out there to pick from, and it’s easier to think of them in isolation sometimes, because otherwise you could go mad like me.