At the moment, eBuyer UK has the SanDisk 960GB Ultra II for Â£150 with free delivery.
Very tempting, but I think I'll wait for it to hit the magic Â£100 mark first.
Since I built my PC back in 2009, I've been upgrading the SSD to the next one double in size each time one came within a certain price point, starting with an OCZ Agility 60GB, then a Vertex II 120GB, then a 240GB SanDisk Extreme and finally a SanDisk Ultra II 480GB.
I had the 60GB and 120GB for roughly a year each, each which failed and were RMA'd a few months after installation. I had the SanDisk 240GB for about 4 years (fault free) as SSD prices did not come down much up until last year. I got the 480GB SSD earlier this year and probably will keep using it until a 1TB model hits the Â£100 mark.