Rear cup shock 197/200 diffences

So I have just received my H&R springs which surprisingly I found on Amazon for 136.99 with free delivery which is the cheapest everywhere I looked!

Just had a look at my shocks and I have the FF shocks and so will be buying the cup ones to fit with the springs.

But looking at the cost, the front 197 cup shocks are a reasonable price but the rears are £120 a side!

So would there be a problem using either 200 cup shocks all round or using 197 cup fronts and 200 cup rears?

I take it if I did get the 200 cup front shocks I can just use the older top mounts or is that not the case?
 
Don't mix and match as you'll upset the handling. I'd say go for 200 all round, but you need to make sure they are the early 200 front shocks as the top mount changed sometime in 2010
 
Okay so looks like I'll be doing 200 all round.

Will the older top mounts not just go on the newer 200 shocks or is it not a straight swap?
 
I'm not sure to be honest, probably need a 200 owner to confirm if it's just the top mount that is different or if the shock is too.