Hey guys. I've been offered Erik Karlsson for Corey Perry straight-up in a deep, points-only keeper league. What should I do?

I have pretty great forwards and less depth on the blueline. I'm set in goal. Without posting my whole roster, my keepers if the season ended today would be...

Defence (3): Kulikov, Quincey and probably Hamonic (this assumes Lidstrom retires)

Forward (5): Perry, Spezza, Michalek, Plekanec, Neal

Goal (1): Howard

Wildcards (3): Berglund, Okposo, Holtby

I guess my question is more geared towards keepers for next season. Looking at it from that perspective, do you trade Perry for Karlsson? (I am in first place this season, but I am fading fast.)

Thanks for whatever advice you can provide!