You will find they would perform a whole lot better if you disabled all the lens corrections in the settings. Most people haven't figured this out yet, including Canon themselves

You may also find this affects other brands too, but the mileage may vary.
I had a canon bashing session at their stand on Saturday but forgot to bring this up. It was all size and ergonomics related which are terrible. The EVF issue will eventually go away by itself when faster CPUs find their way into the new upcoming models.
Personally if starting out today I'd skip them and head over to the Nikon particularly if you are into the longer stuff and want more affordable and more portable primes, if a touch slower.
Best deals should be on Tuesday afternoon, however in many / most cases it looks unlikely they may get close to Panamoz pricing and warranty levels. There may be some good deals though, perhaps a near give away R6 mk1 depending how keen they are to get rid of all their stock