I know, I know .........

I am a "newbie" , but would like to know everyone's opinion. Just purchased a 2006 GMC crew with a short bed and am about to remove the 285 Dick Cepeck's and go back to "stock" size. My consideration's are not "off" road , but just a really good quality ride with occasional use of a 4000 lb car trailer..
Thank you in advance and probably more questions to come

Rich