Business LOGO

I am looking to have a logo designed for a new business I am about to start, the business is selling phone covers to the end user. We are aiming to build a kiosk in a major shopping mall and are looking for a logo for our letter head and also a sign based on the company name "XCOVER". The unique covers we will be selling are glass diamond covered cases. I need a sign/Logo to stand out and have a bling look and feel to it, however I need the Letter head logo to be simple and have a corporate look. I do need both logos to be the same but have different looks to reflect there use. Please be aware that I have already spent money on the project but the ideas and variations in design where few and far between. If you do quote for the job please consider that I need a variation in the design's so I can look at various designs and option, before making my final decision.