Which ohm version of the DT 990 premium should I get?

After my Sennheiser HD 555s have basically decided to disintegrate entirely, due to the brittle cheap ass plastic for the cup frames. I have been looking at getting some new headphones and I saw the Beyerdynamics DT 990 premium on amazon, but I'm unsure of which ohm version to get. 

I feel like 250 ohm would be put to good use for a lot of things, but should I just go the extra mile and get the 600 ohm version and then get and a good amp like the O2 amp you guys showed?

The 250 ohm version is $245 right now on amazon while the 600 ohm is $332. 

If there are other headphones you guys think would be better for around the same price, I would like to know.

Thanks, Dan

There's very little sound difference, especially compared with other brands. Get the cheapest one but factor in the cost of an amp.

However, my new love is the CHC SIlverados - on sale at Amazon for $99.