I agree with eventerdrew. TB/Welsh's are great!
I would choose Mardi Gras over Marmaduke, definitely. Mardi Gras is actually not too far from me. Lovely stallion. I also agree with the idea of just looking at their website for foal sales, or contacting them to buy an unborn foal. Or a mare already in foal. AI is not cheap and sometimes requires multiple breeding on different cycles, which means lots of vet bills and shipping semen costs (which isn't cheap, either.)
I breed all my own mares by AI. I do all the ultrasounding, too. Depends on your vet, but per farm visit to ultrasound to check when the mare is ready for semen, a vet bill would run $100-150. And ultrasounds need to be done multiple times per cycle for the greatest chances of the pregnancy taking.
Then, shipping fresh, cooled semen across country will run anywhere from $400-500. We have to have semen shipped to us multiple times per week (for different mares), and believe me it definitely adds up.
Anyway, good luck in whatever you end up deciding to do! I really love Mardi Gras!
(p.s. Your light blue text is really hard to read.)
A good horse is worth more than riches. ~ Spanish Proverb