Hi Guys, after thought I am looking to get the SP4, rather than the Sbook for various reasons. The big question now is I5 or I7. the I5 has the intel HD 520 the I7 has the intel Iris 540 I have looked all over the internet but can find no benchmarks on these two chips. Does anyone have any info? Even for the SP3, the I7 benchmarks are all over the place, and it's very hard to tell the normal difference between I5 and i7 when heat comes in.