Pretty good leap from an ego to a Provari. However, there is nothing really better, all things considered. The Provari is more an evolution to a solid variable voltage device with an Ohm reader, built of the highest quality and precise electronics and power delivery. There are dozens of China made devices between the ego and the Provari, and many of them are quite good and considerably less expensive. I've tried most of them and know from first hand experience that at one point I really had to have variable power, which the Provari lacks, and an ego threading for my evods, which the Provari also lacks. That aside, I use carto tanks now, and don't need variable power, have sold about a dozen mods in the under $100 category and primarily only use the Provari's at home and a mini Provari when away. Occasionally, I will also use the Innokin iTaste 3.0 when out and about, and I do keep an eVic as a backup with variable wattage/power.
If you can make the leap, then by all means, do so. If you need to experiment along the way, do that, and don't worry, vape gear holds its value really well and stuff sells like hot cakes on the ECF classies and eBay. I got rid of half my collection in under a week on eBay, and often for more than I paid. I was quite surprised how the auctions turned out.
For a long time, I had all the China APV's and the Provari's, evolved from clearos to cartos/tanks, and do the RBA thing on the weekends with Ithaka, Genny and Kayfun's, and drippers. So, that's my two cents. Go for it, if you can, or enjoy the journey. Either way, you can't lose. Best to you!
