I run 3 PDW-F335s (exactly the same as your F355s but without the under/overcranking and HD/SDI out).
We have 3x EX1 cams as backups.
They are excellent. Infact I’d say they are better, especially in lowlight. I’ve just bought a PMW-350 and am looking at changing from the PDWs to the PMW-350s soon.
Workflow wise, you’ll match the EX1 with the PDWs with minor touch ups in post, as they both are 1/2″ sensors. I use Edius and it takes both formats straight on the timeline side by side realtime with no issues.
Go for it. The EX1s are great cams.
Raja Singh
Sadha Video
UK