I have to agree with most of the others replying here. If your Enya is one of the performance models maybe OK but if it is a sport 40 I would move on to somethig else. The Enyas I have used are not all that great for top end performance. You need big gonads to get off the water especially if the plane is a bit heavy. This also brings up the point that Enyas are fairly heavy so that means you will have to add more nose weight. Be sure it balances properly no matter how much weight it takes in the nose. Also consider a tuned pipe or a Nelson pipe to help with the top end.
I use a GMS 47 with the performance pipe and have no trouble getting off the water. I hear a Webra 50 has the best power to weight ratio of any of the engines out there so if you can swing it I would go for that.
Peter