Sennheiser HD 650 or HD 600?


I'm a beginner audiophile who will be buying a set of headphones in the next couple weeks.

I can get the 600's for around $400 CAN and the 650's for around $550 CAN.

I'm just wondering whether people prefer the HD650 or HD600 and if it is worth the extra cash.

Also, if people would like to give me an opinion for inexpensive (max $400), yet excellent sounding headphone amps that would be great.

Thanks,
Matt
matt_grace
I agree about the 600's over the 650's with a good headphone amp (tube possibly). Though a little less accurate and not quite as full range the mid-level Grado headphones are very enjoyable.
Ok, but despite the fact that I need a good amp, which is the better set of headphones?

I've been reading that the differences are night and day and the 650 are better by far. However I've also read that the 650's are too colorful, perhaps creating a loss of clarity.

Thanks for the help guys.