Never had over heating issue with 1730 the 1530 yes they are smaller the 1730 is the alienware design size wise. I have extend complete care anyways so no matter what new laptops every 12 months anyways
I have over 3.5 years left time wise out of $600 5 year warranty i paid for.
I will either sell the laptop or keep it and wait for the next gen of gaming system and then whoops I dropped the laptop and they cant fix it anymore then they send me the latest greatest gaming laptop.
thats why I paid the big buck for the best system on the market and then paid for the best warranty.
Plus if ever have issue I can repair my own laptops from dell Im a Certified Dell tech.
the larger the laptop the more breathing room it has.
plus i have always ran i8kfan program with cards fans on high and a laptop cooler and never gets hotter then 50 degrees under gaming load.