FSx on SSd or Hdd

Hi all
I have just purchased a Kingston 128gb 200v ssd now been reading fourms and some say put operating system on ssd and run fsx from hdd
and others say other way rnd
any ideas wot would be best
thanx Andrew



Processor Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
Memory (RAM) 16.0 GB
Kingston 128gb 200v ssd
Seagate Barracuda Green 2TB SATA 6Gb/s Hard Drive
Western Digital Caviar Black 1TB SATA 6Gb/s 64MB Cache
Graphics NVIDIA GeForce GTX 560
Windows 7 Home Premium 64Bit
2 x 23" monitors