Rob,
There is no stock in the country as yet, to my knowledge they have not even been shipped from the factory yet, they should be here in approx 2 weeks. I'm not sure that GAC advertising them already has been well received........
The difference between the DTX SH rod and most Guideline rods is that the DTX bends deeper when pushed rather than almost locking up half way down the blank which makes it far more versatile. Forget the whole "shooting head rod because I fish heads" thing. Buy a decent rod with a progressive action and it will cast any line you care to put on it.
Cheers
Ben