Not one you looked at, but I'm 5'5" and have a 30" inseam, I've found the Giant Trance 16" (mens model) has plenty of standover but I've had to put a 60mm stem and a riser for it to feel just right reach wise. I understand in the UK they have brought out a Trance Womens, could be worth considering (reckon one should be coming out in the US & Australia for 2007). 4" both ends!
If you need more than 4" consider the Giant Reign.

Good value for money, and the Maestro Suspension system works really well.