Hello, I'm new to the forum. [Hopefully I have properly introduced myself at the top of the forum] I am seeking for my second DSLR camera via several search engines. I came to this forum and hopefully I can find my answer. First, I'm not a professional photographer. I always enjoy taking picture but over the past years, I begin to apply it more for my business marketing tools. Hence, I would like to have an upgrade. I have the first series of Canon digital rebel. I believed it is a 6.3MP camera. I equiped it with an EF 28-135mm and a 100mm macro lens. Recently, I added a 580EXii flash to my collection of Canon. I would to use the new camera [perhaps new lens] to take indoor portrait, closeup photos, and occasionally family activities [ I have two young children and soon adding a third]. I would also like to have some of my photo print into size either 16x20 or 20x30. [of course, provided that i have the skills to take a "sharp" image to explore to such dimension] So, having said that I have been searching on several used cameras...e.g. Canon 50D, 7D, and Nikon D300 also Canon 5D MKII.--All used pricing. And through that search I have gotten more information than I can handle. At the same time, I also gain a better ideas as to where to start. For one thing, it has gotten me here to seek the Omni Photogeeks [I meant it in positive way] advise and soak up much needed information. Where do I begin? well, for one thing, I would like to know if my desire to blow picture up to 20x30" min of 250dpi or higher...will a full size capture camera be better than a APS-C? [FYI- I ask for this b/c I have read several website columns and few postings from CfusionPM and Derrel AND still not sure about it] And how much photo touchup program [i.e photoshop] can assist on that division? eg. upsizing I also went to a website of Cameralabs.com and saw the comparasion of high and low ISO quality of Canon 50d, 7D, 5D and Nikon D300. To me with an UNTRAINED eyes, I also believed that in general Canon gives a softer image. Now I'm not sure if I want that in my portrait photo but my initial response would be "no". Adding all that request, I should also mention that I'm currently have two lens from Canon. EF 28-138/f3.5-5.6 and the EF-M100mm/2.8. (1) MR-14EX. Recently, I also purchased an used 580EXii. Now, as far as what I have read those lenses are "okay lenses". I dont think I will have a problem to switch to a different maker b/c of the existing lenses. I guess I will miss those flashes more. But hey if what I seek is lies beneath on a Nikon body...then so be it. So what should I do? Honestly, I never thought about how expensive can this upgrade costing me until I started doing the research. On the same note, if I have learn one thing from my other interest-making a good cup of espresso-that is any machine will make a good cup of espresso [provided by the hands of a skillful barista] but with better tools one can enjoy the result of the taste and less worry about the machanic behind the making of it. Once agian, after such long winded explaination [I do appreciate all your patient and time] I would like to know what would you recommend for me? Thank you in advance. PS- I'm aware of the new Canon 60D but based on what I have read I'm not sure if it will offer anymore than what I have selected. Frankly, I don't really care for the video part of the 7D or 5DMkII....just the speed and the size caught my eyes. Of course the used price for what its offer. Thanks.