Dell won't sell this laptop without dedicated graphic card, u need to choose the cheapest card to get it. the heatsink will not be the same as higher grade card, u will need to look for heatsink separately if u were to buy better graphic card later.
This laptop boot 10 times longer than consumer laptop. If u are fine with that then it is ok. I simply hate it, I have an XPS side by side, open the lid and windows logon will appear in few seconds. 7780 is 1 min. The laptops are from complete shutdown, i am anti sleep/hibernate.
The heat does not come from GPU, but majority from CPU. if u want quieter, choose slower CPU.