How to upgrade my current Intel processor?

[MSwhip]

I would be upgrading my Intel Q9550 2.85 Ghtz Intel Quad Duo Core2.
Which of the Sandy or Ivy Bridge current Intel processors is the first level that upgrades mine?

Thank you kindly

 

[NTMBK]

None of the new Sandy or Ivy Bridge processors will fit into that motherboard, so you will need a new motherboard and RAM.