Gday.
If you do decide on a new system, rather than buying a pre built, consider building your own.
This Intel i3 based build will be a good general purpose system, also decent gaming, upgrade as high as you want in the future. use you existing PSU, GPU, HDD, optical drive.
Included a SSD. > http://uk.pcpartpicker.com/p/H769YJ
You could use an i5, > http://www.amazon.co...G/?tag=pcp0f-21