I've sampled some of the new 25mm figs from Irregular Miniatures. From left to right : Austrian Grenadier, Austrian Musketeer, Prussian Jager
rear view of the same
Austrian officers are not yet available. The Austrians will find their way into my armies. I like the Jager and I'll think I'll use them for dismounted dragoons. [the infantry are approx 28mm from boot to eye]
Prussian Cavalry, from left to right: Dragoon, Cavalry Officer
They also do Prussain Cuirassier, Cavalry Bugler, Cavalry Ensign, Hussar, and Bosniak Lancer.
In general the cavalry are on the smaller side - the horses are not a large as other ranges - if you have them all in one unit then I think they look OK.