I currently have the OCZ Vertex 3 120GB. Was a lovely purchase at the time, but the size is now limiting me as I knew it would eventually, and I'm fed up with using Steam Mover or SteamTool to move my game around. So, looking at prices: OCZ 120GB Vertex 3 - £92.54 - I buy one and raid0 both together? or OCZ 360GB Agility 3 - £234.43 - Will last me as a main drive for a long while. However, I did spot one of these, possibly too luxurious and small capacity ... OCZ 240GB Revo Drive 3 - read 1.5MB/s - write 1.2MB/s - 200k IOPS ... games would almost load instantaneously ... Lastly, will my existing 120GB SSD work happily in an eSata port? I don't know anything about eSata, but I think my 120GB might now become an external drive depending on the advice I get. I've done a little searching for eSata speeds and discovered that my current mobo (P8P67 PRO) has 2 eSata300 ports - I've seen eSata-600 now and i haven't what the actual speeds are yet. I have found a PCIe storage controller that does eSata 6GB/s which would be perfect for my next computer ...
one more SSD and RAID0, you will get even more speed out of them that way. I run 2x 60GB SSDs, will add two more when I eventually run out of space.. Regarding eSATA, it is normal SATA, but with a more solid connector.
But I read in a few places that raid0 doesn't increase speeds over 1 larger drive, is that not true anymore? It could have been old reviews I was reading. (added) Ignore that. I just found this: http://www.tomshardware.com/charts/ssd-raid-0-charts-2011/PCMark-Vantage,2616.html
I would personally go with one bigger drive (I'm actually looking at a Samsung 830 256gb) since I don't want to deal with multiple SSDs, since I've already got 4 HDDs, and that looks to increase.