Easton makes good stuff though I have zero experience with their cranksets. As for PF30, the answer to that is "NO". The BB shell (frame) on the Sirrus is a BSA 1.37" threaded (English) shell. Press Fit 30 is a totally different animal and won't work...and sometimes a massive PITA on the bikes it's designed. PF is just not an option on the Sirrus, though. BSA threaded is just extremely easy. You can still get a crankset that sports a 30mm spindle but it will require a proprietary BB...sort of like the Praxis. It's a 30mm spindle on the drive side necked down to a 28mm on the non-drive side. SRAM GXP is similar in that it's a BSA threaded BB but the DS is 27mm and NDS is 24mm and that would work on the Sirrus. Easton might have an appropriate BB for the BSA...it's just not a PF type. I'll look up that crank and see what I can find about it.

To keep things less complicated, you'll want to stay with a "ROAD" crankset like the Zayante or similar. Getting into MTB cranks you will find yourself in the rabbit hole of multiple Q-Factors (the distance between the outside edge of each crank arm) as well as many different chainring offsets and chainlines. The Q on the Praxis is 147mm, IIRC, and the chainline of the OEM 42 I put back on is dead-nuts centered on the 6th cog up from bottom. No spacers are needed on the BB. Aside from my little detour on threading, it's a 20 minute install from BB till finished.

One thing I can say is the Zayante Carbon is an impressive product. I've already got 60 miles on it and it's silent, generates not one bit of vibration, and is ultra smooth. The BB has good bearings in it and you can go ceramic if you choose. If mine wears prematurely, which I doubt, I'll go ceramic. I've spent twice as much for SRAM cranksets on my mountain bikes, both GXP and PF30, and I'm thinking fit and finish on the Praxis is equal if not leaning towards better. The $300 price point is great.

Lastly, I went with 175mm crank length. It made a difference in power from the 172.5's that come on the bike. That tiny bit of leverage is surprising significant for my size (5'11"). I've been there before on MTB's when experimenting with 170's and 172.5's. The smaller felt better on my knees after long trail rides but I lost my ability to hammer through the chunky trail features. It's quite amazing at how much such a small measurement can make such a difference. My climbing power on the road is improved. I'm getting more out of my output.