very interesting. Do you think that you experience is also that the 353X is a superior amplifier, like Zolkis mentioned?
Superior to the 323S yes, but still less refined than say the SRM-007t. However for the price, if you're in the EU, I'd rather buy Erik Konka's tube Stax amp I wrote about a few pages back.
With the 353X the L700 was a bit more rough than the 007 and 009 (and only in comparison with the Omegas), but with the tube amp it was smooth enough. For any account I agree the 353X+L700 is one of the best bargains in the head-fi world.