Buying new chain rings for my crank?

Im currently using a Deore front crank.

But im looking to replace the rings (all 3)

But im un sure what one i have as in m525 and the like.

Just looking on CRC and see they have a few different types.

Are they all compatible or would i just be better off buying a new crank altogether.

The one i have is a few years old.

better off buying a new one rather than separate rings which can be expensive
http://www.chainreactioncycles.com/M...?ModelID=40496

Cheapest option is probably
http://www.bike-components.de/produc...ach-4-Arm.html
but as Fergal says, if replacing all rings you're better off buying a full crank as you'll also get a replacement bottom bracket.

Is there much noticeable difference between the deore crank and the xt?

I see the xt is double the price.