I think there are two causes - poor insulation, and where the hot air exhausts. The hot air from any oven has to exhaust somewhere. My range has a vent that is down the center of the cooktop. When the hood is on, that heat goes right up the hood. I've also seen some ranges where that vent opening is also through the cooktop but along the back. I think that when hot air exhausts through the front of the oven, often near the floor--where it dissipates into the kitchen before having a chance to go up the hood--it heats up the kitchen more.

When shopping for a range, try to see if it is well-insulated - usually the door is a good indicator, especially if you have a few different ranges side by side in a store you can see differences. Then look at where the oven's hot air exhausts.

The venting is my area of biggest concern. The GE vents out the top rear. If you are using the oven and have left out at the back you can come close to burning yourself if you grab it. Unfortunately it appears that most of the slide in ranges also vent at the top rear of the range.

True venting is not an option, unfortunately. We are stuck with an over the range microwave for a "vent."

The Samsung nx9500 is at the top of my list based on reviews, ratings, and features.

http://www.samsung.com/us/home-appliances/ranges/slide-in/nx58h9500ws-slide-in-gas-range-with-true-convection-nx58h9500ws-aa/

I went ahead and purchased the Samsung today. Time will tell if it was good timing and a good choice. The range was on sale for the same price it was over the July 4th weekend. I am waiting to see if Labor day brings even better prices. I also had a coupon that knocked $200 off the price. So either way I think I got a good deal. Just wondering if it could have been better.