All the major DSLRs have excellent sensors and optics - far batter than even the best pro gear of 10years ago.

You get more value for money by staying away from the top two (Canon/Nikon) - Olympus/Pentax give you a lot more for your $$

Consider buying used, the pace of new DSLR models and the latest shiny toy factor means that you can buy last years models that are hardly used, for a fraction of their original price. (checkout bhphotovideo and keh)