25/26/30 all have the same bore 86mm i believe
Difference is in the head, Id go with the 25 NEO as they are much cheaper then 26s to replace (alot less work too without the awd sump and all)
25 NEOs can run 400hp safely if tuned right, only think good about the 26 is the forward facing plenum...
Or do a 30 conversion if you want the "big bad boy"