headphone amp question


I have an Antique Sound Labs MG Head OTL Mark II headphone amp and Sennheiser 580 headphones in my main system. It seems that the volume in my library (another room) is too much for my wife so I am looking to add another headphone amplifier to that room. Should I buy another ASL headphone amp or upgrade to the next level? I plan on keeping the Senns. I like them alot. What other candidates should I consider? I know there is another headphone only site, but I have grown accustomed and comfortable with the advice from Audiogon. Thanks for your guidance. And, by the way, thanks for years of advice and entertainment from this website.
tgrisham
I have the Woo WA6SE and it's a great amp. It might be overkill for the OP's Senn which is why I recommended the Little Dot MKII. I'll add the MKIII. Which is the one I had and is really nice for the money, is a nice upgrade to the MKII and does nice with tube rolling.
Oops. I misread my own post. I did recommend the Little Dot MKIII after all. Please excuse my silliness. The MKIII is still a very valid and excellent amp.
Also...the BravoV2 is VERY inexpensive...about 60 bucks shipped from our Chinese brothers.
K den...the Bravo V2 arrived...and it's really a cool little bugger...sounds great on initial listening and is now the coolest looking thing in my "audio pile". Dead quiet and works perfectly using the unused single ended outputs on my preamp. BRAVO indeed! Cost less than 3 drinks in a New York bar.