Ive been searching for a 4th gen 4Runner for a while. Was looking at limited's but have come across a clean used Sport Edition. I am looking at V8 4X4. It will need to tow a ski boat around 3500-4000 lbs with trailer and loaded up. I just found out about the x-REAS system on all the Sport Editions and saw some information that made me concerned as far as potential repairs to the system...especially that it would have to go back to the dealer to get fixed. I have also read in the past that Sport Editions do well towing with larger disc brakes? Just wondering if any can inform me as to whether thx-REAS system is a plus or minus. I understand what it does and am OK with that. My concern is a having a big repair bill down the road for something I may not need. Are the advantages of the system worth it as far a s safety? The 4Runner has 87000 miles on it. Also, any other differences that I may not be aware of as far as towing between the 2 trim levels, or even the SR5 for that.