I have listened to the Raptor in a friend's house sometime ago and based on my recollection the WA5-LE is quite better. I was in between the WA22 and the WA5-LE becuase of most of headphones are wired balanced due to my Rudistor RP010B. My audio chain can be configured either single ended or fully balanced so that was not a deciding factor.
I listed to the WA22 fed by a balanced CD player at Canjam using my balanced T1 and I also listen to the WA5-LE with the same T1 using my balanced to Single Ended adapter. To my ears the WA5-LE even being single ended sounded better than the WA22. Then I had a conversation with Jack about both amps and which way to go. Between what I heard and the conversation with Jack I was convinced that the WA5-LE was the right way to go. I ordred it with all the electronic upgrades including the Teflon sockets and also the tubes upgrades. I can not be happier. I love my amp. You can see it here:
http://www.head-fi.org/forum/thread/506402/my-new-woo-audio-wa5-le-the-black-beauty
If money is an issue I would go with the parts upgrade since you can upgrade the tubes later. You can upgrade the rectifier tubes and driver tubes for a nice pair of NOS for around $200 total and then later you will just need to upgrade the 300B. the first I would upgrade would be the driver tuebs then the rectifier (this just becuae of cost) and then the 300B.