Generally for average or better performance, and esp re-sale most f/g production boats would be better bets than steel. Many steel boats are homebuilt (with the notable exceptions - in our area - of Waterline yachts and the Amazon line) and as such will be perhaps suspect in construction, fit and finish, and even design (or the execution of a design)
There's nothing like the confidence you can have in a well built steel boat, but the maintenance aspects will for the most part be more daunting although modern coatings have gone a long way to make things better with steel.
Heading 'round the world? to the Arctic? Sailing at night through debris fields? then a steel boat may make more sense..... for the average recreational sailor not necessarily so much.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)