Is it worth getting a R8, just have gotten my 2nd R7 last Black Friday and it is awesome. The r7 can sell 400 on ebay so is it worth

Last Black Friday I bought myself new laser Jammers updated the system and I bought a brand new R7 and then I sold my old R7 on eBay fetching 400 bucks. So now I'm thinking of getting the R8 after reading a few features that I might need down the road if I ever get the R9 laser Jammer is for example I think it pairs with that and they are seven doesn't I don't know for sure. If there's anyone out there that can give me any insight as to the advantages of the R8 over the R7 is it worth...

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