Power Attack, Expertise and the like DO count for manouvres. They aren't "special attacks" at all and can be used whenever the strike would require a melee attack roll. It's stated nowhere that they don't apply. In several places, however, there's mention of them being used together. Check out the Discipline weapon enhancement in the back. It specificly says that you can use PA and such with a strike, boost or counter.
There is one exception to the "no extra attack while using a strike." Time Stands Still, Diamon Mind 9. It allows for two subsequent Full-Attack actions, benefing from extra attacks.
Both of these questions have been answered on the Wizards-site, so check there if you don't believe me.
On a sidenote: Try combining Time Stands Still with dualwielding and the Combat Rythm option from the Stormguard Warrior tactical feat.
