2 yrs to get to trial in state court is typical in my state, but not sure about yours.
Briefly, what is the nature of the defect(s)?
Have you had your own experts such as an engineer or independent inspector go over the house yet? If not I suggest you do. Someone who represents your interestes and is paid by you.
Have you closed yet? If yes, how long ago? If not, you have more leverage than you will after closing.
You need to write to the builder by certified return receipt mail if you haven't yet.
If your state has a Right to Repair law defining a builder complaint process you have to follow it. Don't hire an attorney who doesn't understand it.
http://www.nbnnews.com/NBN/issues/2006-04-03/Front+Page/index.html It's builder friendly, sorry to say.
Do you have an arbitration clause in your contracts? If so, your lawsuit will probably be thrown out of court and you will have to arbitrate the dispute with your builder, possibly with an arbitrator who favors builders. So, to avoid wasting time, make sure you CAN sue before you threaten to or before filing suit. Arbitraiton is touted as being faster and cheaper than suing. I don't know about faster but I have seen plenty of evidence it can be very expensive.
NJ investigated the home building industry a couple of yrs ago. Perhaps you will find some helpful resources from the state site regarding that investigation:
http://www.state.nj.us/sci/nci.shtm New Home Construction Abuses