I bought my one and only DSLR in August 2005, a Canon Rebel 350D (which I think is about 5 generations of Rebels ago). I bought it as an upgrade to my Canon PowerShot S30 from June 2002. I knew exactly why I was doing it: I needed the flexibility of an SLR, I needed the better noise, the higher pixel count, and I wanted to get started with getting into more "advanced" photography that a P&S doesn't allow. My plan as of 2 years ago was to keep the Rebel until around 2011, when I figured I would have a basic set of high-quality lenses I wanted and where my skills and needs would be at a point where my intended upgrade - the 5D Mk II (or III if it's out) - would be the full-frame camera that had those features that I then needed. But here I am in 2009 with a 4-year-old camera body that works fine, but I find myself reasonably sure I want to upgrade. But I'm really not at the point where I was 4 years ago in certainty, nor am I at the point where I can invest in a 5D Mk II. Why do I think I want a new/additional body? (1) I have found myself in several situations -- mostly when at the telescopes pursuing astrophotography -- where 2 bodies are necessary and I have missed shots because I didn't have a second body. (2) I'm doing a wedding next month and I'd rather not just rent a backup body, I'd prefer to have my own backup/additional. (3) Over the last 4 years, sensor noise quality has increased pretty significantly, and for my astrophotography a low-noise sensor is imperative. (4) Having video capability, as on the Rebel T1i or the 50D successor that is rumored to be released this week or next (60D or 7D according to the rumors I read) would be useful for several applications, not only at the wedding I'm going to but also for astrophotography of planets. (5) I've actually had a few times where the 8 Mpx sensor in my 350D was not enough. (6) Having the integrated sensor cleaning system would be very nice, though not necessary, since somehow those specs of dust always manage to land on my sensor. (7) Additional focus points. With that said, why do I think I don't want/need a new/additional body? (1) Cost. I'd have to pull funds from other parts of my budget (likely from coins which has a much larger budget than my photography) as I was not planning on purchasing a $700+ body this year. (2) Constant upgrade cycles. By the time I was actually originally planning on purchasing a new camera - in 2011 - whatever I would buy this year would be a dent in that budget. I would likely force myself to put off a purchase until 2012 or 2013 of a new camera so as not to buy one 2 years after I just did. (3) I lack a good-quality tripod and had planned on purchasing that first (albeit next summer). [Note - okay, even I think this reason sounds dumb.] (4) The reason I gave in my preamble where, as opposed to in August 2005 when I was convinced I needed a new camera, I'm not convinced this time. I'm not sure why - perhaps because the idea just came to me today - but I just don't think I'm quite at that monumental, "I can no longer do what I want to do with the current camera I have." With all that said, I guess it boils down to: What do you think? At what point should someone upgrade? Do you think it sounds like I should? Or can you suggest additional questions that I should probably answer before I decide? In addition to that, I'm really not sure to what I should upgrade. The Rebel T1i seems to have what I think I would need. But it seems like such an incremental upgrade to spend $750 on. This is as opposed to the 50D which doesn't have video, but is only 50% more, and seems to be a significant increase in sensor and build quality. But that analysis may be meaningless come Tuesday with the rumored new camera announcement. I would expect the 50D replacement to be far superior to the 50D, especially considering that the Rebel T1i ≈ 50D at the moment. And as I said before, the 5D Mk II is out of the question at this point due to its cost.