Thankfully, bigger bras have got so much better than they used to be. I remember when I first went over an F, then a G, and the selection was fecking godawful. It's improved hugely - still a way to go, but it's getting there I think. And that means we don't have to live with beige bras
There is definitely an element of getting what you pay for with bras, and I would always chose a specialist bra manufacturer who specialises in d+ bras every single time. That doesn't mean spending a fortune as I find a lot of good deals, but rather getting a good bra reduced to a cheaper price, rather than just a cheap bra.
I think we might need to try a few more (sorry!) to try and narrow down your shape and fit, especially when you've not been wearing wires for a long time. It's a bit like trying to find jeans - if you're anything like me I take five hundred and seventy squillion in to the changing rooms to find one which fits!
Now, some good brands to try are Panache (who also make Cleo, sculptresse and Masquerade), anything by Eveden (who make Freya, Fantasie, Fauve and Elomi), Curvy Kate, and Bravissimo own brand. There is also the awesome Ewa Michalak in Poland who are FABULOUS at bigger bras BUT we need to narrow things down a lot more before thinking about them as the sizing is tricky
You'll find all of these brand (bar Ewa) on various websites but here's a few to get you going;
Leia Lingerie - retail arm of Eveden. here is their sale stuff that's available around your estimated size, and here is the full price stuff which comes in other colours. There is a nice purple one on the sale link...
MyCurvesandMe - the retail arm of Panache. [[http://www.mycurvesandme.com/lingerie/bras.html?bra_size=212 here is their 40H selection, it's smaller than normal I think they might be restocking. The Panache Andorra is a bra I know a lot of people really like especially in bigger sizes.
Brastop - linked to Curvy kate although they do sell other brands link to their 40h selection. Lots of colour in Curvy Kate lines so if they work for you it will be a result. The Gia balconette is a lovely purple, as is the lola and there's a nice red jewel one too.
Bravissimo, the god of big cup bras (they have a fantastic fitting service]] - I think they are due to release a new range soon, their website looks a bit sparse too.. here is their 40H selection. The Alana is a good bra if it works as ever year they bring it out in lovely colours, and I've heard good things about the Calessi too.
Hopefully that gives you a start.
P.S. red lines are normal - just like you get from the top of socks and such like.