Tires are a personal choice, there are many good brands.
As for the front end, one option would be to use the new front end kit the dealer offers. It comes as an assembly, all in one box. You will need a new pitman arm and steering damper though. That kit has tie rods, drag link, etc all together.
I put this kit on my 2007 3500. It is noticeably beefier than the OE parts. Same stuff as they use on a 4500/5500.
LINK with part #
Prev: 2010 Cougar 322QBS (junk)
02 Dodge 2500 4x4 5.9L CTD 3.55
07 Dodge 3500 4x4 SRW Mega 5.9L CTD 3.73
14 Ram 2500 4x4 Crew 6.4L Hemi 4.10
06 Chevy 1500 4x4 E-Cab 3.73 5.3L
07 Dodge 1500 5.7L Hemi 3.55 / 2010 Jayco 17z
All above are sold, no longer own an RV