Grakesh,
The Hawk is a tiny speaker. Some may even call it cute. Despite its small size and being a very simple two-way design, this speaker really does require a very large room to strut its stuff. This is not to say you cannot get away with using this speaker in a 15x15 room. You just have to understand that over-all the space would not be large enough to let the Hawk do its thing.
I experienced this many homes. Even in my own house, this speaker really started to open up when placed in a 20x20 living room that was open to a dinning room, hallway, staircase, you name it... When placed in a 10x10 room, the Hawk was just horrid.
The Hawk is inefficient so you will need an amplifier that sports high amperage and a watt minumum of around 60 per channel. The Sim I-5 is an excellent 'budget' piece of equipment for the Hawk and can match well. Still, you are only getting a faint idea of what this speaker is capable of. Idealy, you will need to run a BAT (vk60?) amp, a nice Lamm pre amplifier with a fairly compotent source (vinyl, redbook, pick your poison)...
Please bear to mind that I am approaching this from the standpoint of achieving top performance from this speaker. Totems over-all play nice with a lot of equipment, but to get that extra ounce of magic from them takes some patience and experience. The Hawk is the most difficult Totem to work with.
Unfortunately, I have very little experience with the Mani-2 aside from a few brief listening sessions - which I hardly consider applicable for giving advice or opinions. It's a great speaker.
The Forests are great speakers because while they require some pretty beefy electronics, they are incredibly versitile speakers. You can throw a wide variety of electronics at these speakers, along with a huge assortment of media... and the Forest will play it all without bias and sound pretty good to boot. Now, its tone and signature is quite different from the Hawk - so if possible, take a listen and see which signature more suites your fancy.