Im probably going to get shot down now, but I would say go for it!
I couldn't get the photo link to work :( but consider your mares weaknesses in her confo and choose a stallion which is likely to improve these faults. Also consider the stallions temperment. From what I can tell, temperment is inherited not just learned. Think about what confo will make a good horse for whatever disipline yoiu plan to train in. Ask someone experienced and not connected to the stallions to help you decide which one to choose.
Most important, get a good, no brilliant, vet to help you and read up about every little detail about the covering, gestation, birth and post birth care to give you and your mare the best chance of getting through to the otherside!
And PLEASE make sure you are close to hand at birthing. Alli's dam lost her 3rd foal because her owners couldn't be bothered to do foal watch. The umbilical cord strangled the foal after birth. Totally avoidable if the owners had been responsible. Stupid farmers- horses are more complicated than cattle or sheep! haha