Most bang for the buck: The Watch Boys. Perfect fit and finish for around $125,-. Looks very similar to OEM straps for less money.
http://stores.ebay.com/The-Watch-Boys-Stor...8QQftidZ2QQtZkm
A less expensive alternative around $ 35,- would be BOB: http://www.waccex.de/catalog/index.php?language=en. The straps look great, but some people find them a bit 'plastic feeling'.
I own several straps from both strap makers. In fact the strap on my pics in the other threads is the BOB caramel calf.
Did you order a Swiss or Asian movement? If it's the Asian you need to check if the end of the Swanneck is not pushed over the dagger arm, which I had. It didn't affect the time keeping so far, but it's an easy fix.