Well, this escalated into something that was very interesting and informative to read. Thanks everyone! (: I'll probably read the discussions here at least three more times before I think I've understood, haha.
The stallion was indeed very choppy to ride, on the few occasions that I did. He had trouble moving freely even in the pasture, trot especially. I'm guessing because his pasterns couldn't absorb the impact well(?), his front legs were often swollen and needed tending. For that, I am happy he is in the skies now, free from it all..though he was a lovely horse, the sweetest stallion. He followed me around everywhere and just made me laugh. I guess I was too naiive, didn't think that something other than his pasters were a problem before.. but it's good to know, now I can be more watchful of these traits in other horses.
Elana, I have thought about breeding the mare to some upper-class stallion. Just maybe not at the moment, I don't think I'm financially prepared for that. But, I'm very fond of the idea, haha - I have even searched for hours, trying to find a possible stud from some European country so I could ship frozen semen to Estonia.. but so far, few results that I actually like. Yet I'll keep thinking and looking ;)
To anebel, the mare Starry isn't that special when it comes to bloodlines. The only 'shiny' part of her pedigree is the fact that she is half andalusian - but neither her sire or siresire have any major accomplishments. And don't get me started on her dam - she was a 'something' cross aswell. No competitions.
Then there comes the latvian stallion I listed here, his sire was Gvidons, siresire Guido(KWPN), siresiresire Voltaire (yes the one and only). So basically, the lineage was much better on him than the mare, haha.
Do you know the lineage on the Andalusian side?
And that damline on the sire?
Guido is a jumper line, but I like a little jumping blood if the damline is a good type. I would like if the mare was lighter - but might be just that she is fat.
Andalusian lines again depend on the bloodline as far as suitability for modern competition - and especially if the mare has been crossed out with lots of draft blood this can diminish the possibility for a good dressage horse.
To complement a dutch jumping line I would want to see a nice rideable mare with 3 pure gaits and a good type that is not heavy, and also a horse who is not spooky or flighty. Then, it still depends on what traits the foal inherits from each parent. But I would not fault the stud based on the sire line, but I don't know the dam line.
An interesting cross - but because of the different type of each horse, I would be wary of creating a "frankenhorse", but also the possibility to create a nice horse.