I think I have it narrowed to the Mjolnir and the Violectric HPA V181. Any thoughts on the 2? Currently it will be driving Denon 7100s and soon Audeze LCD-2s. However who knows what the next pair could be. Hifiman HE-6s are a possibility. I'm OK with a tube amp as well. I listen to mostly hip hop, electronic,rock , some classical.
Under $1k retail finished based product I can only think of the Mjunior, some Audio-GD amp's and the V181's, you can possibly get some used units in the F/S section for around $1k or little bit less.
But if you can handle yourself some DIY, there are a lot more options tube or solid state balanced platforms under and over $1k. The thing about DIY is that if you follow the normal BOM for the components and not going for any fancy wires, cap's, resistors then you can stay within budget easy and doesn't really cost a lot. If you really want your end product to look classy and neat looking than work on the case enclosure itself would probably be the most expensive thing out of everything else.
The only under $1000 and balanced amp from Audio-gd is the NFB-6 which is what I have and I love it. The remote digital (no potentiometer) volume control is a terrific feature IMO. It puts 5.92 watts into the 38 ohms of my HE-500.