New PC opinions, please. [GA inside]

Hi SteamGifters!

I'm in the market for a new PC (mine's been toast for a while), and I came upon a decent deal for a pre-built machine at a budget price. It comes with some customization options that I'd like to poll all you guys on.

Overall, the PC is low-ish spec for a new setup, but seems to me to be more than enough to manage modern games. I'm not 10000% sold on it, but with the price it's at, I think it's very appealing. (Apparently, this is not a great deal, and I suck at this - thanks for your help so far, guys.) My question for you all, is what (if either) should I upgrade from the options of processor or HDD?

For the processor, the base option is an AMD Ryzen 5 1400, upgrades to a Ryzen 7 1700X for $150 USD. I have a decent separate workstation, so this will be a gaming-dedicated box, so I shouldn't need too much extra in terms of multi-tasking ability. I don't know that I need the higher proc, but maybe I'm wrong? Maybe I don't need it, but might it be better for the long-term investment/future-proofing?

For the hard drive, the base is a 1TB HDD, upgrades to a 256G SSD (with 1TB for storage) for $100. In my own experience, a slow drive or a shared system/storage drive has been a real pain, especially for some games that read a lot of assets while loading (I'm looking at you, Cities:Skylines). It never impacted my performance enough that I thought I ought to upgrade my drive on an old computer, but I'm upgrading the whole shebang, so I figured I might as well.

Overall, are either of the two upgrades worth it? (And before you suggest, getting both is getting me up to my limit on budget. I could maybe squeeze it out, but I only want to go that route if you all convince me it's really a worthwhile investment.) Is one especially better than the other? Are neither going to make a noticeable change in how I play? If you could fill out the poll, that'd be helpful, but any other insights you want to provide would be much appreciated.

In thanks, I offer you the following (L1+, I check winners on SGTools):
Gibs for you (spaces for bots): https://www.steamgifts.com/giveaway/ y9v0J /tacoma

Edit: Just in case, here's some other options I'm looking into at least at the moment:

https://store.asus.com/us/item/201708AM230000005/A47366
http://www.dell.com/en-us/shop/dell-desktop-computers/new-inspiron-gaming-desktop/spd/inspiron-5680-gaming-desktop/ddcwblsk104ph
https://www.amazon.com/dp/B06Y8XJJ7L/_encoding=UTF8?coliid=I3OMZPVCIVOZL0&colid=1O52B4PPBVBMR&psc=0
https://www.amazon.com/CYBERPOWERPC-GXIVR8020A4-Desktop-i5-7400-7200RPM/dp/B0767S8KCX?tag=hardwarevol03-20&th=1

Thanks!