36" range or cooktop with under counter oven
I am trying to decide if I will get 36" dual fuel range or a cooktop with a 30" under counter oven for my new kitchen. The cooktop and oven option seems cheaper (36" decor cooktop only cost $1200, plus a 30" bocsh oven for $1800, total is $3000). But dual fuel 36"range seems much more expensive,the cheaper brand kitchen aid is $6000. Am I calculating this right? The sale person at appliance store told cooktop plus oven is more expensive.
Please share your experience if you have a cooktop and an oven installed under the counter (I don't have the layout for a wall oven). Do you know any other brand is reasonable price and reliable? If you kitchen aid 36" range, do you like it? Is it good quality, reliable?