if you mining on laptop profits that you get maybe not be comparable to the losses you received (your laptop will be burned) I suggest assembling own computer

1. Processor minimum intel core i3
2. Motherboard Asrock H81 Pro BTC ( PCI-Expressnya 6 slot )
3. PSU ( in accordance with the number of VGA)
4. Ram 8GB
5. VGA with ram 3 GB(vga with chipset radeo serie like 7950, 7970, 7990,  280X )
6. PCI - Riser
7. Hardisk, SSD.