Yes Eresh, it is. I can't buy a Radian, it is not the same price range and wouldn't be reimbursed and DS is already RFing in one in my car right now anyway. I am comfortable with him FFing in DH's car which he rides in less frequently and actually plan on him FFing in my car by spring/summer as he's in a growth spurt and won't be under 45 lbs for a lot longer!
Maybe you've already picked up seats .. if not ..
For DS: a Graco Nautilus or Argo or an Evenflo Securekid if you can get one yet.
For DD: a Graco myRide or Evenflo Triumph 65
You could get both for $250ish with sale shopping.
Another option would be something like two My Rides, then have one Radian and one My Ride in Each Car. When DS moves to a booster, then DD could move into the Radians.
Glad to hear everyone was safe!