the smaller AudioNote UK speakers are very good as well and because they are made to be corner loaded they can allow a better integration into your smaller room.
I've owned ProAc tablet 50's and they do some wonderful things so don't sell them or you may regret it later.
I've owned the AudioNote AN-E's they are the largest stand mounted speakers they build but they have others in smaller sizes, and they do base quite well, I'd suggest the AN-k's or AN-J. they are also quite efficient and Tube amp friendly.
Very musical speakers that you wont miss anything from the Proac's and you will get a more refined sound, more detailed, and more base (not bloated but fast).