[size=medium]I have not made a direct comparison between a stock WA5-LE and an upgraded one.[/size]
[size=medium]When I was looking at buying a Woo amp I was thinking on the WA22 since my system is fully balanced. I had the opportunity to compare the WA22 and WA5-LE with my own T1 headphones at the 2010 CanJam.[/size]
[size=medium]After listening to them and talking to Jack it was clear to me that the WA5-LE was the way to go.[/size]
[size=medium]I have always been a believer that your sound will be as good as the weakest link in your system chain. I do believe quality parts and wiring make a difference so I decided to go all out with the exception of the RK50 pot since it was another $700.[/size]
[size=medium]I went with the Teflon sockets, parts upgrade and I convinced Jack to let me send him the Neotech OCC Copper wire and Cardas Eutectic solder. I also upgraded the RCA connectors to WBT Nextgen.[/size]
[size=medium]The tubes I ordered from Jack a pair of EML 300B Mesh, a pair of EML 5U4G Mesh and a pair of the Treasures CV181Z drivers. I did not like the Treasures and sold them.[/size]
[size=medium]Right now my favorite combination of tubes is the EML 300B Mesh, USAF 596 and 6F8G round plates/black glass.[/size]
[size=medium]The last upgrade I have done is the umbilical cord. I went from the stock to one made for me by our friend Keph based on Neotech OCC solid copper wire. I was able to notice and increase in dynamics and cleanness in the sound with the new cord. [/size]
[size=medium]Looking in retrospective I would have been probably better getting the WA5 instead of the LE but back them the HE-6 were not out yet. The LE does a good job with the HE-6 out of the High Impedance output (it probably has more current) but I truly believe they will benefit from the extra power out of the K1000 output of the WA5. [/size]
[size=medium]I love my WA5-LE the way it is now. Last night I listened to it and my HD800 and switch to my SRM-727II and SR-009. To be honest IMO the WA5-LE/HD800 combo is very close to the level of detail and soundstage of the electrostatic rig and probably has deeper bass.[/size]
[size=medium]If you would have to sacrifice the upgrades to go to the WA5 then then the LE with upgrades but if you have the money to do all and you own or thinking about getting the HE-6, LCD2/3 or any other inefficient headphones I would go with the WA5 with the upgrades.[/size]
[size=medium]I hope this helps.[/size]