You are about right, if you buy a 60# Savannah, it will draw about 52 pounds at your draw length.
When you jump to a custom, there are a few guys that have high performance bows that really kick ass for a short draw. Centaur is one... But, in general, you can drop a few inches in bow length and maintain a smooth draw and the bow will be more efficient at the 25" draw than a longer bow, designed to draw 28-30 inches would be....
Good Luck!
PS...there are a BOAT load of good, custom, used bows out there that you can buy for 300-500... so dont "jump" on the savannah just yet. Its a decent bow though...what do they cost?