I am going to say this to get straight to the point. I would choose Trane if i were you. You have been impressed by sales rep. That cares trane, you want Trane and they make a great system if installed properly.
Although I sale Trane, have Trane in my home and have suggested getting Trane. I have no dog in the fight but if you fell comfortable withe the trane dealer and you want trane buy it you want be sorry as long as installed properly, serviced properly and have full warranty.