playtex bra for full figure?

Jo
Has anyone who is full figure ever used the no wire playtex 18 hr bras? Cacique measured me at a 42DDD and in some I can wear a DD. I'm so tired of wearing a sports bra over my bras that don't fit and being gouged by under wires. I also don't have a lot of money and these don't cost as much as other full figure bras. 
How's the support? Shape? Comfort? Does it hold you up well? 
One of my issues is that I look heavier when I'm not supported. I also do a lot of bending and lifting at work and need something to hold me in.