I have no idea about prices in your area, so I will only suggest in general.
I recommend that you buy at least core i5 4.gen. CPU (i7 might be better if you can afford it ofc. - some encoding software use multicore better, and thus work faster)
motherboard could be ASUS, MSI or similar big-brand. (all support BlueRay if SATA-300 or better) - go for the best offer in your area
No less than 8GB, 1600 MHz RAM (preferable 2x8=16 GB)
If possible - add a high end GFX (Nvidia Titan, GTX 780-ti, or better), or keep it in mind for future upgrade.
a good powersupply - at least 650-800 Watt if you plan to upgrade GFX later.
The box is not important - reuse an old one if possible.
copying is of cause faster on SSD, but f.ex. my WD-Red series 4 TB disk transfer ~60 MByte/sec average on huge files (+50GByte).