I have never heard a PSB speaker, but the measurements of the T6 suggest to me it's a quality speaker.
Do you have any woodworking tools by any chance? If you're interested in spending some free time putting together speaker boxes, you could end up with a wicked good DIY setup within your budget
Not really no, I've never done something like that before.
I just remembered, there is a store fairly close to me that sells PSB speakers, they don't have the Image T6, but they have the Image T5 and they have all the other Image series speakers as well. I'll have to pay them a visit and audition the PSB. If I do happen to like PSB, I'll ask them if they can get a pair of the Image T6 for me and maybe give me a deal as this place is good for giving deals most of the time. I think it's between Paradigm and PSB now, considering they are relatively close in price for each of their offerings.
One thing about the Image C5 center, it has two 5 1/4 woofers, while the Paradigm CC-290 center has two 6 1/2 woofers plus a 4 1/2 midrange driver. The Paradigm is a 3-way and the PSB is either a 2 or 2.5-way design. Wouldn't the Paradigm sound better?
On the other hand, the Paradigm Monitor 9 is a 2.5-way design while the PSB Image T6 is a 3-way design.