Hi Aarush ,
New IIT's are as good as the older ones if it comes to the quality of education but they do not havne as great a market value as them as they are comparitively new. If you get a choice between a NIT and New IIT you can go for a NIT for their better market value. You should also base your decision on what branch you are getting where .
details about NIT check the link below.
http://www.askiitians.com/aieee-counselling/aieee-engineering-counsellings.aspx
Cutoff in new IITs check the link give below :
http://jee.iitd.ac.in/openclose09.htm
Feel feree to postas many as doubts you have we wud be happy to help.
All The best !!!
Anshul