I guess the primary concern is two things:
1) The very existence of the R5 - in a very, very objective perspective...it's a defective R7. Don't get me wrong, I was sold on it up until a friend of mine mentioned lanes and not having enough headroom without a R7.
2) Lanes - Will the combination of an R5 and X370 chipset handle an M.2 SSD and (x2) GPU's? Should I be concerned? At my local computer parts shop, I can get an R5 1600X for $220, but can get an R7 1700X for $290...Should I fork out that extra $70? I know the two can perform almost exactly the same, so I guess it is a matter of core and lane count.
I would like to 'moderately' future proof my new system. I have already bough all of the parts except for the CPU (waiting on next pay check). I went with the x370 chipset for a future crossfire/sli setup (and just 'cuz). I prefer AMD, of course, so probably 2 RX 580's or Vegas...we shall see what the future (next two months) holds. As of right now, because I got it super cheap, I have a GTX 1050ti. For the time being, it will work for my 1080p TV (yes, TV lol....QHD 144hz monitor to come). I put my build below. Thanks
Asus ROG Strix X370-F
Asus ROG Strix GTX 1050ti OC
NZXT Kraken X62 AIO
16GB, 3200Mhz G. Skill RAM
Corsair MP500 120GB M.2 SSD
1TB WD Blue HDD (more probable)
Cosair HX750i PSU