Peter
It can be a bit lumpy up the Needles Channel with wind against tide. Some of the worst will be around the Needles Fairway/Bridge Bouys. Stay well clear of the Shingles bank on the way up. You can get some nasty breaking waves over them.
If you get there in a SW F5 plus when the ebb is in full swing it may be better to take the North Channel along the mainland side.
Hurst Narrows can have a nasty short sharp chop at peak flow, but it only lasts a couple of hundred yards, and should not be a problem.
Pick your time and you will wonder what all the fuss is about.
{Edit} Sorry Richard, you got there first.