If you're looking for something different from your Klipsch, I'd put the T1+ at the top of the list. Unlike the other 3, Emotiva offers your choice of 2 very good 3-way center speakers if you upgrade that too later on.
Wharfedale 12x series is reportedly more neutral than warm, due to a complete re-design and using a different speaker designer (the same guy who designed the QA speakers) than in previous generations.