Hello guys im new miner, and i need your help.

I started with BTC mining 3-4 days ago in http://mining.bitcoin.cz and i earn (Confirmed reward: 0.00064147 BTC) im mining with 15 pc servers only CPU mining some of them have an Xeon 24 threads mining processor and other 8-16.. So its worth me to keep mining at this site? Because i saw some peoples talking there some other site like http://btcguild.com you can earn more than http://mining.bitcoin.cz ?

Also some of peoples tell me its not worth to start mining BTC better go and start LTC, but i dont know how to start ltc and i dont know good sites for LTC like for BTC i found that mining in one forum and i start with it so i need your help to tell me some good sites where i can do this:
- Mining LTC
- Exchange LTC like payments to paypal or payooner (bank).
- I saw one site: https://emebtc.com idk its good?

First what is better to start ? Mining the LTC or BTC with this? Because look my screen:


http://i.imgur.com/c0Kh3x7.png