Just to let you know: You need to pick one name and stick with it according to our rules. You cannot fluctuate between names. Also, netspeak is not just frowned upon, it is against the rules, so please refrain from using words such as "kwl" and "u" because it is difficult for non-native speakers of English to understand. Please read the rules; there is a link found at the top of the page next to the Post button.
To answer your question, I've known only two Rebeccas, and I don't particularly like the name. I tend to stay away from Biblical names, though. I think Anne/Anna and Louise are pretty with it.