[seadogs1]

  any opinions on the Woo WES, the Headamp Blue Hawaii SE, the Cavalli Liquid Lightning 2T or any others?

[dB Cooper]

I've only heard the Blue Hawaii (with the Stax SR009) but that was some of the best, maybe THE best, headphone sound I have ever heard.

[ajzepp]

I have no experience with them, but I know on head-fi the Blue Hawaii is always the one people rave about.

[L1C4]

Bottlehead Paramounts... I think they would be a great affordable solution compared to some alternatives.

[Armaegis]

Bottlehead Paramounts... I think they would be a great affordable solution compared to some alternatives.

But that's just a power amp (and likely can't swing high enough anyways). You still need something to provide the bias voltage.

[Freo-1]

I have a Stax SRM-007TA, which sounds great with the Stax SR 507 phones.  It needs a step down transformer, but they are not expensive.  The amp's performance is improved when changing out the Russian 6FQ7's with NOS tubes.

[seadogs1]

Free-1, What boat were you on? I was on the James Monroe SSBN622.

[hibuckhobby]

Ah, you were on a boomer!   I was on SS243,  SS377 and SS394.
Hibuck...

[JohnR]

I've listened to the Blue Hawaii, I don't remember which Stax headphone. What I heard was really nice, just realistic, not "blow you away" anything. You can still find the schematic online (possibly an earlier version) for anyone sufficiently motivated DIY-wise.

[kp7]

a bit pricey

[Freo-1]

I've got a KGSS-HV ESL amp driving a pair of SR-007 MK2.  I really like the sound of the combo.  The KGSS-HV is very well built and is very reliable.


 

[Jon L]

any opinions on the Woo WES, the Headamp Blue Hawaii SE, the Cavalli Liquid Lightning 2T or any others?

By 2T, if you mean Stax T2,  that's what I would take myself given the choice.  Of course, the modern DIY version costs $$$$/time to build and even more $$$$$$ to buy one from builder/owner. 
Blue Hawaii SE is much less expensive but still $$$. 
Don't forget the Sennheiser electrostats and amps, but those are rare and $$$ also.  See the pattern here..?
As far as Woo, Cavalli, I recommend some serious googling before putting down $.