Ranman223,
The stamped receivers on AKs built after the mid 1950's are every bit as good as the milled ones and lighter to boot. The original stamped AK-47 receivers had durability problems. Milled receivers were a temporary fix while the bugs were being worked out of the stamped receivers. The guns on the new stamped receivers were called AKM (Avtomat Kalashnikova Modernizirovannyi or Modern Kalasnikov Assault Rifle) and sported a few other improvments to the original AK-47. This is why Bulgaria is one of the few countries to opt for the more expensive milled receiver.
One of the reasons they became so valued in the American market tis because the Bulgies are some of the best AK's made, and the imported receivers could be built into rifles with less specialized tools. This, and the problems with the original AK's led to the common misconception that the milled receivers are of higher quality than the stamped ones.
medicmandan,
If you have the extra money get the Bulgarian AK. I think that the better craftsman ship is worth the extra money. If you want a beater rifle that you can just throw in the back of a truck guilt free then get the Romanain.
Have you though about the Arsenal USA or Nevada guns?
Here is my Arsenal USA SSR-85B. They are built on a Hungarian receivers (or Ohio Ordnance Works receivers on the later ones) with Polish parts, and my Romanian AK-74 built out a converted Romak 992 (single stack SAR2).
Kyle