Probably best to mention that the CA AVR's only pass through video through HDMI anyway, no audio at all, so its only of use for switching.
You'll need to run a toslink or something anyway to get sound into the receiver.
If I were looking for a cheap receiver, I'd definitely take the 540R V2 as its only £199! If you need HDMI, then the V3 is £349. I believe the V3 also gains Incognito Type II and advanced bass management settings too, which may be of relevance to you. But, to be honest, the V2 is a steal, and only for 1/3 of the cost of my 640R!