So, I purchased a Canon XSi (w/ 18-55 IS, 55-200 IS, & and 50mm 1.4 lens) as my first DSLR after previously shooting P&S. I had no idea really what I was looking for and throught the XSi would cover anything I could ever need it for. Well, after almost a month, I've found that I never use anything except the 55mm f/1.4. I shoot mostly in low-light settings or action shots and haven't found the 18-55 or 55-200 really fast enough for my needs. In basketball gyms or in the house, I just don't have enough light to shoot fast and the result is too much blur. My plan is to move up to a 40D when I receive my refund because the XSi + lenses is very close in price paid to a used 40D body. I can use my 50mm 1.4 while saving for another nice lens like a 17-50 or something similar. What the 40D gives me is more robust, light weather-sealed body that shoots almost double the burst rate to capture my son in action. One other complaint I have is the noise at high ISO. Noise increases with ISO, but I've found way too much noise in my night shots on the XSi. Does the 40D offer any improvement in it higher ISO settings? Or, should I consider a D80 or D90 for high ISO performance (not trying to start a Canon/Nikon debate). I'd be willing to switch brands since the 50mm lens should be easy to sell with little $ loss. Since I'm still a rank beginner, I was hoping you may be able to help assure me this is not crazy or break the news that it is! I really hate to return ~$750 worth of equipment. Thanks in advance! I appreciate your input.