Sounds like you would enjoy the Telefunken tubes... they are the quickest sounding tubes to my ears. The NOS Telefunkens are expensive, but JJ is currently making rebranded tubes which are supposed to be decent. I would imagine that they do not compare with the original Telefunkens, but it's worth a shot.
To give you an idea on cost, here are some links...
Original Telefunken tubes - very fast, quick decay, "solid state" sounding, with a very natural sounding tube infused sound... not particularly warm or bloomy... good for faster genres like metal/jazz:
http://www.ebay.ca/itm/Telefunken-E88cc-NOS-tube-/201388070918?pt=LH_DefaultDomain_0&hash=item2ee3aa1806
(Note the getter and the support, with the dimple in the middle and the angle on it. Also note the number code vertically on the side, and the gold pins. Also note the dual supported stage, beneath the getter, and the shape of the grid. The ones made in Ulm, Germany have a diamond imprinted on the bottom... these are the most sought after).
http://www.ebay.ca/itm/TELEFUNKEN-E88CC-ECC88-CCa-6DJ8-6922-ULM-GERMANY-1968-GOLD-PIN-SINGLE-TUBE-/400959682714?pt=LH_DefaultDomain_0&hash=item5d5b0f389a
(Another auction with good pictures, note how everything checks out as per above)
http://www.ebay.ca/itm/1x-TELEFUNKEN-tube-E88CC-E88-CC-NOS-NIB-6L6-300B-AD1-Eb-AD1-350-380-CCA-/261963352743?pt=LH_DefaultDomain_0&hash=item3cfe3b8aa7
(And another)
Here are the new production tubes, made by JJ in Chekoslovakia. The black label ones are apparently hand selected.
http://www.telefunken-elektroakustik.com/products/tubes/black-diamond-tubes/e88cc-tk.php
I would also recommend a Russian tube; the Voskhod rocket style actually does quite well with faster genres, such as metal. Instead of buying off eBay, you may want to contact
@rb2013 as he has a selection of tested tubes. He is also a great resource for 6DJ8 tubes, as he put up a fairly comprehensive review. He rates the Russian tubes as #1... I do not. He has a lot of believers in the tubes, and I personally found they worked best for fast genres, myself. The Russian tubes are a crapshoot on eBay, and I would strongly urge to consult rb. They are also fairly cheap, although he probably sells the most highly rated ones for more. I haven't heard any of his "holy grail" rated tubes, so I can't comment on them.
PS. The model numbers and price of headphones doesn't dictate quality... (eg. the Beyer DT-880's imo are much better sounding headphones than some of their newer models.) Just food for thought. Price does not always equal listening pleasure.