The 830 has been replaced with the 840/840 Pro. I would not count on it coming back in stock since it's not made any more.
It would be easier to get the SSD now and only have to install Windows once. The Crucial has long been one of the most reliable drive on the market as well. It's not the fastest drive out there but it's faster than any mechanical drive.
Sorry to double post, but the offer on the Crucial M4 ends tonight, so would it be better to pick up that one, or get the 840 not-pro?