Hello Dan and Happy Easter. I am on S. Vancouver Island (zone 8B maybe??) and temperatures hit about 15 F. every winter. I have over 100 roses but only a handful are HTs (Dainty Bess Cl. and Caroline Testout Cl.) and I have only one Austin (the fantastic Abraham Darby). No floribundas so I can't comment on them. The only roses I recall losing to cold are teas and young roses in pots (Jaune Desprez and Secret Garden Musk Climber). Other tea-noisettes like MAC and Blush Noisette (love this rose) do fine once they mature, even Crepuscule. The only roses I protect are Grandmother's Hat, Cooper's Burmese and the bourbon Maggie (those last two really don't want to live here) plus young and/or precious to me roses. Trying to grow teas, HPs, hybrid chinas and many climbing teas and noisettes is always risky even here on the coast. All of the albas, gallicas, species, spins, damasks, centifolias, mosses and ramblers that I have do well.
Hybrid musks, especially, love our wet and windy climate - Buff Beauty, Ballerina, Excellenz von Schubert and Ghislaine de Feligonde, for example, do really well here.
I don't know whether modern roses would be more or less hardy.