The way I see it you are less than 20 cents per mile, $6100 trade difference - $1,000 more pickup options is $5100 divided by 26,000 miles, plus if you trade today your new one won't be in for about 3 months if you order it, so you will probably have another 4,000 miles on your truck (17 cents per mile trade difference).  I would do that in a heartbeat.  I usually figure around 20-23 cents a mile when I trade every year.