Thinking of replacing my 17r1 with a 17r4 thoughts

So the title says it I'm thinking about replacing my 17r1 i7 4700MQ, R9 m290X, 16gb of ram with a new 17r4 i7 7820Hk, gtx 1070, 16 gb of ram, and the QHD display. thoughts pros cons I don't know a lot about the new r4's yet
I bought an AW17 R1 and was appalled by the terrible sound quality compared with my previous M17x R2. Besides which, after 5 months of ownership the R1 had never worked correctly so Dell took it back and refunded me. In June I purchased an AW17 R4 and there is simply NO COMPARISON between the R4 and R1!

For starters, the sound is unbelievable with an incredibly well simulated 7.1 surround sound experience coming from the speakers. The first time you play a game or watch a film that has 7.1 surround sound you will be blown away. The machine is far more reliable and games are handled beautifully. Some people have complained about stuttering due to thermal paste not having been applied correctly but I have yet to experience that.

Overall I am delighted with this machine. There are only 2 things that I do not like and they are only 2 USB 3.0 ports and 1 Thunderbolt port, and Windows 10 which I absolutely hate!!!

My advice to you is to go for an R4 or wait for a possible R5. The R5 or replacement for the R4 is likely to have the new Intel i9 processor but it will be far more expensive. Maybe Dell will go with the AMD version which is almost as potent but more affordable? Whatever you decide, I seriously doubt you will regret the upgrade.