I have the Mordaunt Short 20i Pearl Edition speakers, which I use as rears in my AV set up, and also as rear stereo speakers with my Dali Zensor 3's at the front. I've also owned the Q Acoustics 2020i's, which I also used in combination with the Mordaunt Shorts.
For me, the Dali Zensor 3's are better than both of the others, so I would suggest you consider them. Admittedly, they will cost you a fair bit more than the 2020i's, but when I changed from the 2020i's to the Zensors, I was really impressed with the difference, especially in the bass department, though not limited to just the bass.
There are a lot of good speakers out there at the same kind of price point, and others may recommend different speakers to me, but I can only advise from my own personal experiences.
Maybe you could go to your local Richer Sounds / Dealer, and see if you can audition 3 or 4 different sets of speakers?