looking for a laptop for architectural purposes...plz help

hey, i am an architecture student.....i need a new laptop...my budget was 62k,can't go beyond...there are two main choices a dell 15r 3537 4TH GEN CI7/ 8GB/ 1TB/ WIN8/ 2GB GRAPH) and a lenovo z510 (4th Gen Ci7/ 8GB/ 1TB 8GB SSD/ Win8.1/ 2GB Graph)..i am really confused between the two .........will using it for autocan,revit,photoshop,rhino,3Dmax.....and i would like it to last me atleast another 4years.....