Brader, i have yet to hear the sound of the 155. 3 of my siblings got wharfes also, specifically, 9.1, 9.3, and 10.2. I love there sound too though I prefer floorstanders for there more profound bass.
I suggest that you audition both the 155 and the 10.6. Bring with you a cd which sound you are very familiar with. I'm sure you'll distinguish which speaker will suit better your need and taste.
By the way, are the 155's bi-wirable? If not, go for the 10.6. afaik, pio 1121 are bi-ampable. if you opt to set-up a 5.1 system, you may bi-amp your front speakers.