Recommendations for monitor/bookshelf speakers

I have a smaller sized room listening room 12x12x10(height) with soon-to-be built-in shelving on one wall. I am shopping for speakers that cannot be taller than 20" and I assume front ported as the shelf they will be placed on is only 20" deep. Am I wrong about must having front ported speakers since the rear of the speaker will most likely to be very close to the wall? To date I have only found the KEF XQ20. I listen mostly to roots rock, jazz, and the Grateful Dead.
Thanks a million.