I agree with Yashu. I had the Proac Response 2.5's myself and recommend them highly. It sounds like the type of speaker that you are asking before in your original post.
Also, I want to add to my first post for clarification. My post kind of sounds like I'm not recommending the Vandersteen's because they aren't good in some way. Nothing could be further from the truth. Vandersteen is my favourite speaker. The OP asked for a speaker that was the opposite of his Thiels. The only point I was trying to make is that they are not the opposite. The Thiels do share some of the same characteristics. That's all I meant to say.
Also, I want to add to my first post for clarification. My post kind of sounds like I'm not recommending the Vandersteen's because they aren't good in some way. Nothing could be further from the truth. Vandersteen is my favourite speaker. The OP asked for a speaker that was the opposite of his Thiels. The only point I was trying to make is that they are not the opposite. The Thiels do share some of the same characteristics. That's all I meant to say.