Hey Mohan - thanks for the questions. That GMAT test is a nasty bugger ain't it? Sorry to hear of the struggles. You're at the point of diminishing returns with it so we wouldn't advise a retest unless you were confident you could increase the score.
Hate to say, you're going to have a very tough time cracking into any of these schools with an investment management career goal and that GMAT history.
Sorry but it's not in your favor. It's possible to transition from consulting to finance but it's tricky, and the schools will need to see evidence across the board for how you're ready for it. This GMAT score (or, all of them, frankly) is only going to make them doubt whether you can compete coming out in the recruiting game.
LBS is also not at all keen on reapplicants so it's going to be a tough proposition there no matter what.
In terms of which version of your 670 to use... it totally depends on what you do with the goals. Neither is going to instill confidence in the adcom for you. We really don't like that low IR; even though it's not officially required, it's definitely getting more scrutiny.
There's just risk written all over this.
Hate to be so negative! You're going to have to build out an incredible pitch that compensates for those weaknesses in a significant, and very strategic, manner if you're going to pull this off.
(Corporate strategy is only marginally easier.)
If you have specific questions for EssaySnark then you can post again. Sorry to be a downer but these are seriously competitive schools and while it looks like you have a lot going for you, you're also coming at it from the classically oversubscribed pool. Hopefully you're nailing that EA deadline for Duke... it can help a lot, particularly as a reapplicant.
EssaySnark Essays Reviewed on GMAT Club FOR FREE!