I've owned the Plinus 8200mkII powering a pair of Totem Tabu's. Never really did it for me.
I've owned the i-5 with both Forests and Hawks. I am currently running a Krell 400xi on the Hawks and would highly recommend it! The i-5 ran out of juice on the Forests. The 400xi sounds awesome with either the Hawks/Forest and even has the power to drive the Winds as well - which I am bringing home next week! ;)
Not to add an amp to your decision making, but you may want to give it a listen. I was never a Krell fan (in fact, i kind of steered clear of Krell) until I heard the 400xi!