There are several brands to choose from and any of them will be good for what you want and the size of 256gb is a good choice for a primary drive.
Samsung , Intel and Corsair would be what I would choose from.
SAMSUNG 840 Pro Series MZ-7PD256BW 2.5" 256GB SATA III MLC Internal Solid State Drive (SSD) $269.99http://www.newegg.com/Product/Product.aspx?Item=N82E16820147193
This drive will be released on 10/23/2012 and I will be looking at this one myself.
Intel 520 Series Cherryville SSDSC2CW240A3K5 2.5" 240GB SATA III MLC Internal Solid State Drive (SSD) $249.99http://www.newegg.com/Product/Product.aspx?Item=N82E16820167086
Corsair Force Series GT CSSD-F240GBGT-BK 2.5" 240GB SATA III MLC Internal Solid State Drive (SSD) $209.99http://www.newegg.com/Product/Product.aspx?Item=N82E16820233208
Here is a selection for you to look at and consider.