Comment on pedigree, please

[vineyridge]

Nashua Miss Dancer
http://www.pedigreequery.com/nashua+miss+dancer

Foal would be for sport and not for racing. Any TB recommendations for a stallion that would continue to avoid the Bold Ruler, Northern Dancer, and Native Dancer?

I've found a stallion who would bring three more Nasrullah crosses by way of Never Bend (tail male), Nashwan, and Bold Ruler. Should there be concern about that much Nasrullah in 5 generations?