If the man is stable, and I am assuming you mean mentally and financially, then he would be able to resolve family issues if they arose. So I'd choose a stable dude any day.
If she is intellectually smart, she'll figure out how important it is for her to work out and get into shape if that's an issue for her or her husband, and for her own well being and self image. I don't know why any stable man would want to marry a dumb girl. I can imagine a MIL wanting her son to marry a dumb girl so she can rule her and the girl wouldn't even know.
rolla: if you have a proposal on table, please go through with following list. i suggest you to go on blind date too (the one in bublic blace even if you are in arrange setub). Islam is complete religion, and shadi is biggest decision of your life. your entire generation is based on your simple yes/no. if you are religions too, then istekhara is also good way to proceed but yes following are the derived concern from a famous hadith of last and only Prophet Muhammad (saw).
family status, culture, financial status, religious compatibility, family background
mental compatibility
physically attractive
jazakallah khair
For dudeeeeees:
Would you marry a fat, average looking, a bit lazy ,intellectually smart girl or
a dumb , pretty , gossip monger and who also wants you to live with her parents?
as far as your question, if i were in such situation then my answer would simply no and willing to wait.