Hi,
I have owned a number of mini-monitors: Totem, Linn, Quad, Spendor, and heard several others. While each of these has its advantages and disadvantages, my favorite, and the one I still own, is the Spendor S3/5. However, ... if you want something that has a more "exciting," rather than to my ear natural sound, these are not for you. Also, forget about low bass unless you intend to get a sub. I briefly heard the older Harbeth years ago and was impressed, but haven't heard the new one so can't comment on it. Also, associated equipment, room and music preference will make a big difference in which one you might prefer.
TLH