Most accessories are available for all model years.
Put on what ever you are going to use, or need.
Everyone's needs are different.
Half the people with built rigs that we would drool over, never actaully use them.
It's all status to them. Wanting people to see what they have.
Don't worry do much about what people have.
Just worry about what you need and want.
- ARB (glad I have it. I already hit a cow elk. I won.

)
- Pyro/boost. very glad I got these.
+ others......
The above two are my 2 recommondations.
Anything else is preference.
needs/wants:
You could pretty much accessorize forever. Get the ones your really want/need, and get the others in time. You have to draw the line somewhere, otherwise you could easily spend every spare penny on your truck. I know I could spend $10K or more overnight.....
My big wants:
-Drawer - This is a big big want. If anyone does not use thier I WANT IT BAD.
I want to be able to sleep in mine, as well as store gear more securely. So if anyone is not using thiers, please let me know.
-Lift - OME coming very soon. (my current shocks are dying fast).
-Sliders - one day. The stock running board are actually very strong. This can wait
-Intercooler - Free power and free MPG. I want one of these. But I also need a tranny cooler at the same time.
-The list would be long if I made it. But I try and not think about it.
Some advise. Draw your line and be happy.
Otherwise you will spend forever looking at other rigs and never be happy.
You have to look at what you have, and then consider yourself blessed. Not the otherway around.

This goes for alot of things in life. I am low income for North America.
Then I look at the rest of the world and consider myself very blessed.
Very very blessed indeed.
Cheers,
Nick