At that price point you may be able to find a used Unico Unison, which is actually a tube hybrid (uses a single tube). I've listened to one through Soliloquy 5.3's which are 90db and the combination was very satisfying. I'd bet they'd go nicely with the JM Labs. The challenge will be finding one at the high end of her budget.
Good luck.
Marco
Good luck.
Marco