Pc Guru_07 said:
i3 will smoke athlon in gaming.Even games which uses 4 cores will run better on i3.http://www.anandtech.com/bench/Product/188?vs=143
While in your link the 645 beats the 540 in over half of the benches.
Right now Arrandale/Lynnfield is dead, over priced and incompatible, its like getting a Q9550 for $300. Either look for SB or get the Athlon II, at least with ASUS boards there is a glimmer of hope in AM3+ compatibility.