I won't say I'm a worrier but...my 20 yr old son said., "I'm thinking of buying a 15 year old bronco for $4500 for his very rare visits home. (he's in a military academy so is rarely here). So my h and I are willing to spend up to 20000 to keep him and any visitiors in a safe 4x4 which will perform well primarily in desert river beds and sometimes on snowny mountain highways. Here are our priorities: roll bars [Are roll bars sometimes standard (hidden) or are they always after market?], decent reliability (it won't be drive often), responsivness, and drivability, and automatic transmission. All the mid sized 4x4's are okay by me. What do you think? Here are the ones that have caught my interest: 4 runner, highlander, xterra, bmw x3, fj cruiser.