The KH120 is also a remarkable speaker in that it delivers far more than you would think possible in such a compact box, and is wonderfully refined and revealing.
But I would strongly advise a personal audition as monitors are quite a personal choice, and I don't know what your expectations and requirements are.
Compared to the KRKs, I think you'll probably find both initially lacking in bass power because they don't 'thump' like the KRK does. For me, that's a good thing (for a monitor) and I think once you're familiar with them you'll actually find it easier to make descisions about the bottom end beacuse they are both more accurate -- albeit in slightly different ways.
But if you need to 'feel' the bass then you might want to look at alternatives, or think about adding a sub. But you'd be hard pressed to get better for the budget you've set.
Technical Editor, Sound On Sound