Hi - my twopenn'orth (trans-atlantic version of two cents worth!) is that if you're hungry, eat. I start getting hungry when I up my exercise, which to me is an indication that my metabolic rate is going up. It's doing this, at least in part, because you're adding the muscle you want.

Can't see the sense in knocking it back again by calorie deficit, especially if you're not trying to lose. Exercise and adequate calories seems exactly the way to swap fat for muscle to me. It's what I intend doing when I get to goal weight, just to finish off the toning up.

PS - you probably already know or do this, but apparently CLA helps with what you're trying to do. Loads of info. on this forum.

Take care, Jay