Headphone amps


I like to listen to music at night - my wife likes to sleep - I can't understand why she does this with so much good music to hear. Headphones have been a blessing for maintaining peace given our somewhat different nocturnal patterns. I'm soon getting a new integrated amp without a headphone jack, so I will require a little amp for the headphones. Please provide recommendations for headphone amps that you have used and loved. I like to listen to jazz and classical at night. I'm using a FMJ 23 as a source and I tend to like tube sound. I have Sennheiser HD 600 headphones.
johnrob
Try this site. Its home to headphone lovers.

http://www4.head-fi.org/forums/forumdisplay.php?s=&daysprune=&f=20
I second the Earmax, especially the Pro. Swap out the stock tubes with NOS and WOW! I have the Sennheiser 600s and could listen for hours...and do!
I don't know about the matchup of my amp with the Seinheisser 600's, but my Berning Micro-ZOTL with Sony MDR-CD3000 cans is magic.

Definitely check out HeadFi for all your headphone questions.

Marco
I would definitely upgrade to Senn 650s--I did on the advice of some Headfi posts & found them to be a major improvement: a fuller but not overwhelming or forward sound. The 600s sounded thin to me. I use the newest version of the Headroom Max (with the new "reference module")with the Zu Mobius cable & I am very satisfied. Tubes are nice but you have to plan your listening because you really can't leave them on all the time, I think, & they need to warm up. Make sure you get good interconnects from your source.