slipstreaming wouldnt be stable either, as its induced build, im talking of a complete 100% original integration, i have an MSDN account and i downloaded this built there and did complete os reinstallation
Guys from Bangalore in need of windows 7 with SP1 , stable build, can pick the ISO whenever you want, use the key which you already have and install it,
Disclaimer : im giving media only and not product key or license, so its no where an act of piracy