I am sorry.
I did not mean to in any way imply you made a bad choice. I think you made a good choice. All I meant was the Samsung 840 (not the Samsung 840
Pro, which is a different drive) was designed intentionally by Samsung to hit a good price point and to do that they traded a little speed.
If you look at the review I linked, the Samsung 840 is a solid performer, and actually beats the Vertex 4 in some tests.
If I had to chose between the Samsung 840 and the Vertex 4, I would chose the 840 because Samsungs (chiefly the older 830) have had very good reliability/compatibility based on forum posts here. Samsung makes their own controller for use in their own SSD, so has complete control over the process and firmware, and I think that helps with reliability.
This is why OCZ bought Indilinx and now uses their controllers. Complete control over the process. The
Vertex 4 uses a Indilinx controller