If your oem steering damper is o.k then i would not bother replacing until it needs to be(You did say you where on a budget).
Don't know the tyer you are looking at, Nankang mudstars aren't to bad and about the same money. If you are planning to do any offroad then go the 245/75r16 and do the snip shown above.(it is all you need and hardly noticeable). A/t or m/t depends on what driving you are going to do but if you want to go offroad muds are best and fine onroad.If you are only going offroad every so often then at's would be the go. I believe once you go offroad you will want to go further so just buy the muds:p.

