I have an 
SC, and some 
CS's and I have sun hoods as well which is likely overkill. I would strongly recommend  you first just try a hood as they are reasonably cheap and fairly effective. The 
SC and 
CS are good but pricey. The 
SC has the big advantage there are no cables and no mount so perhaps the better option of the 2. I have a rubberised hood as additional help. For a 
CS you will need a suitable mount which will set you back a further £50-£100 depending on quality of product e.g. PolarPro - the base model is £49.99 UK at moment. There are cheaper ones though.
The 
CS has a DJI metal hood/ screen protector available which are about £30 for the 5.5" 
CS.
I may have some of these items for sale in UK very soon when I have sorted out what kit to keep and weather improves so I can actually use any of it. They will be absolutely mint condition with very little use. PM me if interested or for further advice.
@1hoax I have just taken possession of an 
Inspire 2 with 2 Cendence controllers which each take 
CS as well as other monitor options so you are perhaps right to go the rather expensive 
CS route. If you are going this far then you would have to get a decent tablet or large screen anyway and of course will lose the non-wire scenario unless you have a Cendence controller. It's an expensive do whatever way you go!