keep the LINN or get a NAIM

just wondering.....i have a linn pretek and powertek/pre power set up that i like....
a brother of a friend is selling his naim3 intergrated amp (to me cheap if i want it)---
i was wondering if the naim3 would be an upgrade to what i have already---i cant hear the amp as he lives on the other side of the u.s but its in mint condition????
i'd be running a pair of linn tukan speakers and a arcam alpha cd....
money is tight so i have to be carefull in my choices..
thanx