I have ordered a shiny new 256GB samsung SSD to replace my old 80GB intel X-25m, but i am wondering what my options are to run the drive at full speed. As far as I can tell, all the cheaper SATA3 controllers are just PCI-e x1 which means they can't reach full sata3 speeds, there is also an asus x4 card around, but apparently this just runs at x1 speed as well 
Are there any other suggestions for a controller which doesn't cost too much, or is it maybe worth looking for a replacement x58 motherboard with sata3 built in?

Are there any other suggestions for a controller which doesn't cost too much, or is it maybe worth looking for a replacement x58 motherboard with sata3 built in?