Yes most Heads are great, assume iM78's are what you mean. Great in bumps, crud, all turn shapes. But not exactly a GS-level ice skate.
You may need to decide something: A ski that excels in high speed medium-long radius carves will not be wonderful in bumps. If you're an aggressive skier, I'd bet the chip version of the 78 will give you more bang at speed, better grip on ice, at a loss of a bit of friendliness in bumps.
But if this is purely a frontside ski, why not go for a real carver, like the Magnum or the SS Chip? They'll give you a whole new take on pulling G's, are smooth and damp, again entail a bit of a loss in bump performance. Narrow carvers make small mountains seem gigantic.