Chetiar,
I am probably too late here but wanted to offer you the opinion of someone who has owned speakers from each manufacturer mentioned (ProAc and Wilson Audio). In our primary listening suite, I previously used ProAc Signature 50 Monitors (and still own these...will never sell) and ProAc D15 loudspeakers. A couple of years ago, I compared the D38s to the Wilson Audio Sophia Series II loudspeakers, and the Wilsons were my preference. I immediately purchased the Wilsons and sold the D15s. The ProAc monitor will be used in a secondary system.
Food for thought from someone who has been there, done that. :-) The Wilsons are likely to be the last speakers we ever purchase. They are outstanding.
Best of luck in your quest.