Buying first new set of wedges

I have been playing with old 2nd hand wedges for years. These things are probably 20-25 year old Wilson wedges. My short game is pretty decent with them. The Kirkland wedge set is on sale for $139 in Canada right now so I'm going to go buy them today.

What can I expect in terms of improvement? Will it be a big deal? I always see people talking about the importance of wedges being on the newer end.

I bought a Kirkland putter in the winter so this is my first year using that and my putting has improved greatly. Last season I was using an older Nike Method Matters putter. Hoping for the same improvement with the wedges to get me over the 90's hump consistently. Just need to find 2-3 strokes a round.