For my own projects, I've done much thinking about keyword1keyword2.com versus &&&&&.com, where &&&&& is a short series of letters that means nothing. Your LCbusiness.com is somewhat similar to &&&&&.com, because LC doesn't mean anything until it is branded and marketed. That's the key.
Look at Google, swoopo, ebay, etc. With enough marketing, the brand will stand out more than keyword1keyword2.com, because keyword1keyword2.com has generic words that can have meaning and power elsewhere, sucking energy away.
However, if you don't have that much time nor funds, go with keyword1keyword2.com, because you'll benefit from the standard SEO mentioned in previous posts.
Another key question is where your traffic is coming from. If Internet, as with most sites, then keyword1keyword2.com, and keyword1-keyword2.com is also ok. But if some traffic comes from offline sources, such as tv or print, avoid keyword1-keyword2.com and &&&&&.com. Why? Think about how it is said aloud. They will be difficult to understand how to spell and then type in a browser.