I have decided to upgrade from my XTi and have a very limited budget to work with. Basically I have $800 to play with (that is the spousal approved amount anyways). For the discussion about my reasons for upgrading see my previous post here: http://www.photo.net/canon-eos-digital-camera-forum/00VFtN So for $800 CDN I think my 3 best options are: a lightly used 50D with no add-ons at all (a grip is a must for me but I just don't think I'll find a deal that includes a grip within my budget) More used but still excellent condition 40D with grip and extra batteries A very well used 1Ds Opinions? So far I am leaning towards the 1Ds for the following reasons: Full frame - this alone may be the one over-riding consideration since the other 2 are cropped sensors. Build quality/weather sealing View finder Autofocus system that I am led to believe is that much better than the xxD's But I have had more than one person tell me that the menu system and general user interface of the 1Ds will drive me insane and that alone should make me reconsider. From my view, these things are what we know and are used to. For example, I borrow my brother-in-law's 5D Mk I from time to time and I absolutely hate the interface on that camera compared to the XTi. I know that this is just a matter of what I am used to and given time, it would serve me well (I haven't heard too many complaints about the 5D Mk I). I think the same would be true with the 1Ds. I played around with a 1Ds Mk II today at a local camera store and while it wasn't pretty, I think I would get used to the interface. I think a lot of pro's certainly did and didn't complain too much about it at the time. While the bells and whistles of the 40D and 50D are attractive, I don't believe they will lead to better images or advance my photography in a significant way at least. The way I see it, the 1Ds was good enough for many a NatGeo or Vogue cover as little as 5 years ago, so why should I expect any less from it. Its the guy behind the camera is it not? So the question is, with $800 to spend, what would you do? And please don't say save a little longer and get a 5D Mk II. If that was an option I would have listed it among the 3 I'm considering. Thanks. P.S. The rest of my kit includes my one and only lens, a 24-70 f/2.8L, a 580 EXII and 430 EXII. My next lens purchase will be the 17-40 f/4L.