Home theater mag just did a review on the PSB Mini- they really liked them but ininuated the need for a high end amp for them to sound their best.
So in addition to the fine choices you have already mentioned-
Swan (from theaudioinsider) makes some nice small monitors like the
D1.1se at $499/pair with a 30 day trial. Size 11.5 x 6.75 x 9in- they have a matching center too
Martin Logan Motion LX16 $799/pair list Size 11" x 6.5" x 9.5", can use the moition 6, 8 or C for center
NHT Classic Two- $299 each, Size 12.125"Hx 7"Wx 8.875"D (sealed so no need to worry about ports, easier placement) also have a matching center
B&W 600 series bookshelf speakers, front ported, not too sure on the size.
KEF Q100, front ported, $550/pair, size 11.8 x 7.1 x 10.7 in, matching center available
Hope this helps.
Gene