Well since you said that portability isn't really a factor, and since you state you are curious about tubes. I would suggest that if you can, save some extra money and invest in a Dared MP5. It plays extremely well the 701's and can double as a great speaker amp. It can be had for a little over 300 from Ken over at Audio Line Out.
As an addition to the PA2V2 suggestion, do not do it. I have and really like my PA2V2, however hooking the 701's up to it will yield very disappointing results. I know I tried it just for grins and giggles while I was waiting on my MP5 to arrive. You would be just as well off plugging the 701 into the headphone jack of your computer vs plugging them into the PA2V2
As an addition to the PA2V2 suggestion, do not do it. I have and really like my PA2V2, however hooking the 701's up to it will yield very disappointing results. I know I tried it just for grins and giggles while I was waiting on my MP5 to arrive. You would be just as well off plugging the 701 into the headphone jack of your computer vs plugging them into the PA2V2



















Thanks for the description, though. I believe the LD2+ may be in my future. I was originally going to purchase a used $30 receiver, but I guess getting the LD2+ instead of an LD2 and the old receiver is equal in price, and will last longer than that receiver.