asp.net mvc 3 - "Three tier architecture with edmx as orm" VS "MVC3 with linq to sql" which one is better !? -

asp.net mvc 3 - "Three tier architecture with edmx as orm" VS "MVC3 with linq to sql" which one is better !? -

our team planning work on new project, need suggestion please guide me. did our previous project in 3 tier architecture using edmx in our ef , found easy code in way. have read in articles mvc3 testing easier code behind eliminated. apart there advantages if our project mvc3 architecture !? improve app response time etc !?

p.s: have time larn mvc3/mvc4, please suggest best technology combinations (not mvc3 ) can utilize in .net develop web application

while shark vs. gorilla question, , off topic, part of reply easy: microsoft has declared linq2sql obsolete , unsupported, don't utilize it.

beyond that, mvc4 selection other web architecture; without knowing more details need cannot perchance answer.

asp.net-mvc-3 linq-to-sql asp.net-mvc-4 edmx