For your budget and intended usage, i find these headphones suitable;

Sennheiser HD485
Audio Technica A500
AKG K530

* > = better than

The sound;
-detail, clarity & soundstage: A500 > K530 > HD485
-bass: K530 > HD485 > A500

Comfort;
-for big ears like yours, i would say: A500 > K530 > HD485

Since you'll be using a laptop as source, i don't think you gonna have any problems driving them cans.

I also think you should go for A500 just to be safe. Tho i personally prefer the K530. But hey, you pick your own poison, right? lol

Davis r selling them...

IMHO, there's no exact winner in sound quality between these two. It is simply a toss-up, because both have different approach.

I said that i prefer the K530 over A500 because to me the bass of K530 is more presentable than the A500. But others with brighter taste might lean more towards A500.

While the K530 may emphasized more on bass, the A500 have better clarity & detail and wins over K530 on that area. That said, this is just my opinion based on my personal preference. So your mileage may vary.

And you don't have to take everything i've said word for word. Think carefully what kinda sound fits your taste before you go spending precious money on any of these cans.