Well what are you trying to do? If you want to build upper chest, yes, incline is better for that. But the preset 60 degrees of angle on the non-adjustable benches is too much, try 20-30 degrees.
If you're looking to build strength on regular bench, just do regular bench, with maximal and power days a la WSB.
But I don't think you'll lose regular bench strength by doing incline, you may even gain some. It just won't be as specific as training regular bench directly.