I'm looking for performance parts and I have a question about an air Intake. Which one is better?

AFE Power MagnumForce Stage 2 Air Intake System-Porgressive 5 Layer

OR

AFE Power MagnumForce Stage 2 Air Intake System-Pro Dry S
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2007 Chevy Silverado 2500HD Classic Ext Cab 4x4 Gas

 

They both do the same thing...get whichever one has a full box around the filter and whichever one is cheaper

 

If your going in mud get one covered/box if not don't matter I like k&n
Importantis mud or not

 

Yes, I'll be goin through mud but not major mud.
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2007 Chevy Silverado 2500HD
-Ext Cab
-4x4
-Gas Powered
-WT
-Commercial Grade LED Strobe Lights

 

I'd keep the stock box and do a drop in dry filter with a airaid jr. intake tube and be done