Just to update my use with the LD2+ and k701.
I don't have too much amp expirence, but the LD2+ is a very clean and pleasent sounding amp. There is never any hiss or off sounds. I do have concerns with the power tube issue, but it sounds like the LD peoples are taking care of it.
The only downside to the k701 LD2+ I see is the power to deliver LOUD volumes. Some recoredings I feel need to be listened to at a grater volume, and when the passages get complex the amp chokes, though I am sure this is due the impedence of the k701's. For example Massive Attack's Angel from Mezanine has a very hard and driving bass line. Towards the middle and end of the song, with the full bass line and the percussion hitting all at once the amp clips. When I use my HD590's (which don't sound nearly as good) running at 120 ohms, there is no clippling. I have removed the gain jumpers, can't really tell much difference.
I don't want to press that this amp is not good. For the price I would say this amp kicks ass. Just my preference with listening volume on some songs can be disappointing. Though where I want to be is gonna cost ~$ 750.
I would still recommend this amp to anyone looking to get into tubes with a great sound for a good dollar.