PC Computer parts a good buy for a litecoin rig?

Hi guys, I've gotten myself into Litecoin mining which is a less hardware intensive alternative to BitCoin Mining, it's like silver compared to gold. I currently own a Y500 with a 3630QM Processor and 2x GeForce GT650M Graphics Cards, it has a 1080p but I'm worried about its durability in the long run. I do not game on the go and also go don't game frequently. I just might take it apart and sell it for parts if money becomes tight in the future.
I wanted something with more power ever since my interest in LiteCoin, and decided to build a computer so I went out and buy some parts, most notably an ASUS HD7850-DC2-2GD5-V2 Radeon HD 7850 2GB 256-bit and AMD FX-8320 Vishera 3.5GHz (4.0GHz Turbo).
With these two devices, I can get run GUIMiner with around 450Kh/s compared to just a meager 80Kh/s with my Lenovo Y500 Laptop.

Thanks for your help and opinions, I appreciate it much.
and Happy Thanksgiving!