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.