Temps will be cooler with the Intel chips, read the Heat/Noise section for more information:
HP Pavilion dv3510nr Review
They say that the thermal performance is very good, just FYI.
GPU wise, if you got the intel 4500MHD graphics, the ATI solution would trounce it. But if you get the Nvidia 105, I believe it will give decidedly better performance.
The high-capacity 6-cell battery looks exactly like the standard 6-cell. I think you have that confused with the 9-cell- that's the one that gives the advertised 7 hours and that juts out a bit, something like------->
http://www.laptopmag.com/review/newg...id=28325&img=7