Which air intake for me?

[snowracer69]

Two questions...

First, my Grandfather picks up his new 2002 CTD in the morning. Anyway, he is wanting to put a 'better than stock' air intake on his new truck for when he's towing his camp trailer (25' Nash, probably 10k lbs. loaded). I was explaining to him the importance of low EGT's and whatnot when pulling a heavy load up a long hard hill, and he wants to keep them low now. So, what should he put on there? This is the only trailer he pulls, and it usually gets pulled about once every two weeks, a minimum of 50 miles a shot. He doesn't drive hard, and isn't going to do any other BOMBing, except maybe gauges so he can know what's going on.

Second, is his "old" pickup, a 2001 CTD, which I am buying from him. He had the oil changed on the '01 yesterday for me, but didn't change the air filter...he figured that I was going to put a better one then stock on there, so he left it be...but, IT NEEDS ONE BAD, so I have to get something. I have my Edge Comp ordered, and someday plan on DDII's or III's. What route should I go for a good quality, high flow intake? Also, one that's not gonna break the bank right off...maybe just a good high flow filter? Are K&N's any good on these trucks? I've read that they can damage a sensor from the oil that comes off them.

Thanks for any help. Josh.