I think it was already mentioned but your best bet is to buy a combination of DR software and hardware together so you take advantage of the discount. A new user doesn't need the speed editor on Day One but as you mentioned, one day you will...
I agree 100%. I did some research before downloading DR, and the subscription free model really speaks to me. I am okay with paying an upfront cost for it, but at $299 USD, it is not a small pill to swallow for someone who is not working on video...
DaVinci Resolve Studio is the way to go. Something that no one has mentioned, the future upgrades are all free, not like other software where upgrades to a new version are paid for again.