There is definitely no shortage of excellent monitors out there.
Totem Acoustic Mani-2 Signatures
Totem Acoustic The One
Harbeth Compact 7 ES 3
Audio Physic Yara II
Sonus Faber Cremona Auditor
The list goes on and on.
I once owned a set of ACI Sapphire XL's. Great speakers. Their greatest forte is their friendly sound and over-all versatility. I would have to disagree with the notion that they require 100 watts to sing well. In fact, a solid 15-20wpc will get the job don e well. That's really the beauty of their design, it really doesn't take much to extract good sound from them. Great sound, exceptional value.
Mark and Daniel also makes a fantastic monitor. Although their first generation stuff was very rough around the edges, it seems the company is finally beginning to create a mature sounding product. When done right, they do things that small loudspeakers simply should not do! hah! However, in almost all cases, you are going to need a very powerful amplifier that's capable of delivering fast and commanding bass. When you treat them well however, they represent a great value. I would recommend checking out the new Diamond+ model if you wish to dip into those waters.
That said, I openly admit that my ears are drawn towards Totem Acoustic products. Great speed, holographic imaging that rivals the Logan's, and sport a tone that IMHO, surpasses them (ducks and hides the flying shoes and avoids the flame throwers). The One's in particular will work exceptionally well with that Conrad Johnson amp.