Whatever you do, keep copies of the recovered wallet.dat files indefinitely.  Just because you can't get it now (unless you end up being able to), doesn't mean you might not be able to do so in the future.

For example, depending upon what has been recovered from each, you MIGHT be able to combine the two into a working one.  Likewise, you might be able to recover part of your private key (or even all of it) eventually.  Or, tools may improve.  Either way, if you are not able to successfully recover something now, doesn't mean you won't be able to do so in the future.

The suggestion of talk to jackjack is a good one as is being careful about who you send information to.

The second that you say the word "format" or "repartition", the only hope is to yank the drive from service and scan the whole surface for any recoverable private keys. Data likely will no longer be where it should be, recovery software will find junk in the sectors where "wallet.dat" is indicated to have been.

After IMMEDIATELY discontinuing use of any drive with possibly-recoverable bitcoins on it, you need to boot another operating system off another drive, and use software that will mount and scan the entire original drive by raw disk sector to discover any recoverable private key data that could be left on the drive.

Get a second hard drive to run off of or bootable USB with a linux distro on it, and get pywallet running on it: https://bitcointalk.org/index.php?topic=34028.0

Then use the command below, pointed to the appropriate device corresponding to the old hard drive and the correct drive size/area to scan, pywallet will go through these steps: 1. read every byte on the disk to look for keys 2. create a recovery file of private keys which enables 3. attempt recovery of password-encrypted keys using possible phrases

python pywallet.py --recover --recov_device /dev/sdb --recov_size 120GB --recov_outputdir ~/foundkeys

Several threads are around discussing this, but there is not one that is at "master tutorial" level.

If he can't help or is too busy to respond at the moment, you could also see if deepceleron has the right skills to help.  He's knowledgeable, and usually willing to help out if he can.

First look for evidence on the hard drive.

Also read this thread. https://bitcointalk.org/index.php?topic=91702.msg1016998#msg1016998

I suggest you remove the "1BTC reward!" from your status.

Those with the skills to actually help you will do so simply because they can, and they like to help.

As you can see from the post above, offering a reward will only attract a LOT of random people who have no idea what your problem is or how to fix it.  They'll pop in here, barely even read what you've posted and then spout off with some random piece of advice they think they've heard someone else offer in the past, hoping that the right answer will be similar enough to what they've said that they can claim they deserve a part of the reward.  Your thread will fill up with useless, senseless, unhelpful confusion and it will become difficult to tell who is offering actual advice and help, and who is likely to waste your time.

If your problem is eventually resolved successfully, you can always still offer to make a donation to the person or people that you feel helped you as a way of saying thanks.

There is someone very reputable in this forum that may be able to help you technically, and to whom you can trust. I believe that is DannyHamilton ...

do you know your bitcoin address , if you do we  can try to get private key!

With bitcoin-qt is just need to closed, then backup the wallet.dat and change of the restored file wallet.dat and start again with the command option -rescan.

In command window type bitcoin-qt.exe -rescan and hit enter.

I can't help, but please be careful which who you choose to help. You seem pretty knowledgeable, so I'm sure you know why.

Good luck getting your coins back!