Which headphones??

I haven't heard the T70s, but based on the graphs at Headroom and some reviews I've read, they and the Sennheisers could be wildly different sounding. I have heard the HD650, and they're very full and rich sounding, with emphasized bass and a soft but still resolved treble. The T70 has a pretty sharp spike in the treble that could be quite fatiguing. If you really want a sealed can, look at the Sennheiser Momentum (which in my book wins an award for best-looking headphone) or the AKG 550--both very well reviewed. The HD600 is considered by many to be better (more neutral) than the HD650, too.

Headroom lets you use a comparison function to overlay frequency response for various 'phones. In my experience the graphs have been pretty accurate to my subjective experience with most headphones I've heard.

http://www.headphone.com/headphones/beyerdynamic-t70.php

http://www.headphone.com/headphones/sennheiser-hd-650.php

http://www.headphone.com/headphones/sennheiser-momentum.php

Sennheiser HD600! I'd suggest you actually try to listening to the 600 vs. the 650 as I've read many opinions favoring the classic 600. The 600's one of those rare audio products that get's it SO right it's considered a classic! Might save you $100 that you can put towards the Cardas cable or headphone amp! I have an old Musical Fidelity tube headphone amp, HD600 + tubes has long been recognized as a yummy combo!;)

Cool! I'll check out the 600 vs. 650 but it sounds like the 600 is the way to go. I was thinking of possibly pairing it with a tube headphone amp. The brand currently slips my mind. I think the reviews I was reading on the t70's stated that it sounds best with tube amps also.

I'm not new to headphones,used them as a musician for years, but not for serious listening.

Mostly because I never had any really good phones and because I ner had a really good headphone output in any of my systems ,except the Cary 300sei.

That was my undoing, and had I tried a few good headphone with it, I would have never let it go and use it just as a headphone unit.

What I can say is that your impression of a pair of headphones depends on what they are pluged into, so I'd suggest when auditioning phones, try out some of the better headphone amps to really get the measure of the phones.

In fact I'd say that the better the headphone amp, the better sound you'll get from even modest phones.

Case in point I have the old Grado SR60's, and they never really impressed until I tried them in the Cary.

Now I'm burning in a pair of AKG K702 in a Yamaha receiver
The sound of the AKG is nowhere near as good as it is when I played them in my Burson HD160 even when they were fresh out of the box.

The better headphone amp lets you hear the difference between the Grado and AKG phones, the Yamaha not so much.

So if you spring for any of the better phones, make sure you factor in a decent headphone amp,if not then stick to a cheap pair of cans.

I'm just tipping my toes into the haedphone waters, but even with what I've got I'm more than impressed with what you can get for so little money.

In the future I may go into the deep end of the pool.

Upgrading the phones and then the amp.

I should probably mention at this point on this thread that Sennheiser 600 headphones sound significantly better, I.e., more open, dynamic and natural, when the metal grills are removed and the foam pads located inside the earphones are removed. I can't speak for other headphones but I have a sneaking suspicion this probably also holds true for other headphones.