try an orange 5 off ebay, you will not be disappointed, i just bought one for the gf a few days ago and its transformed her riding (no broken bones on technical stuff so far)
i have a 20" alpine and without weighing it i guess at around 31-32lbs. yes i appreciate its shy of the magic 30lb weight. if your after the orange five, once again without weighing it my missus's bike must be about 28lb. orange bikes are rock solid and get options on later models for a maxle rear end upgrade and a 67 degree HA is slack enough for a lot of high speed descending fun. I'm going through the process of carbonising most of the components to lose a little weight but i'm 100-105kgs and having a pooh before a ride is cheaper and more efficient than putting Ti bolts everywhere.