I've built them both ways for customers. The straight axle has the nostalgia look----for ride and handling the IFS is the only way to go. I would not, however go with a cheap IFS, IMO either a Kugel or a Heidt's is the only one's to consider... They're the most expensive, but you get what you pay for!!!!

As for the comfort level of a coupe.....I guess it would depend on your definition of comfort. I'm only 5' 9" and never could get comfortable enough in a '32-'34 coupe to actually say I enjoyed a long trip in it..... Many years ago when my kid was just a pup and I was married, I built a '34 Sedan with 3" of stretch in the front of the frame, IFS front, and an equal length, parallel 4 bar rear with Carrera (now QA-1) coilovers---that was a comfortable car on any length of trip!!!!! The coupes are way kewl, but just not a lot of room to stretch out, recline the seat, and get comfy!!!!