Profile evaluation and GMAT IR input

Hi-

I took the GMAT twice and got the following scores:

1st attempt: 710 (Q49 V39 IR 6)
2nd attempt: 720 (Q49 V40 IR 3)

I have until 3/7 at noon to cancel the score on my 2nd attempt, my question is: Although I scored higher in my second attempt, my IR is substantially lower- is this a major concern? Should I cancel the score from my second attempt for this reason? I'm unclear on how important IR is, and whether the drop in IR outweighs the gain in the Quant/Verbal.

For context- I worked for 3 years in a large CPG (was promoted once, increasing responsibility throughout tenure), and then lateraled to an MBB firm as a consultant. I'm considering applying in the coming fall for matriculation in 2018. So total work experience at matriculation would be 3 years CPG + 2 years MBB. Went to a Big Ten state school for undergrad (think OSU/Penn State/Michigan State), was a part of honors college, double majored and graduated with a 3.8 (with honors).

Ideally would like to shoot for H/S/W and other M7 (probably MIT, Haas)- any input on the GMAT piece in the context of my broader profile would be much appreciated!

Thanks!