Since no one has yet asked, I suppose I should...what exactly are you looking for in the new camera? What features of the XS do you wish to upgrade, or are lacking that you wish to have in a new camera? What things about the XS make you yearn for an upgrade?
For example, do you find yourself needing more AF points? More accurate AF points? Better low-light performance? The ability to customize the controls and features of the camera? Faster continuous shooting speed? More megapixels? A rotating touch-screen?
While the 60D, 6D, and 5DIII - and even the T5i - all offer more features and quality than the XS, one or the other may best fit your specific needs. Depending on how you shoot, how much control you wish to take over the camera, and what features you commonly need, the T5i may provide all you need. Or perhaps you are looking for additional features and controls, in which case the 6D, 7D, or the 60D may have exactly what you are looking for.
And beware, Snapsort doesn't really indicate some of the actual important features and differences - such as menu and Custom Function settings/ features that one camera offers over another, differences in controls, or important details of the AF systems. You are better off reading a real-life comparison / review of the cameras.
As far as new models to come, yes, the 70D should be arriving soon, and then 7DII. But there are always new cameras coming, so you should only worry about them if one of the current cameras doesn't fit your needs, and you wish to wait to see if one of the new ones will. Or, in the case of the 70D, the release is imminent and thus worth waiting to see what it offers.