I'd pass on ANY brass-framed cap and ball revolver, unless you wanted strict authenticity as a Confederate in role-playing. The Confederates made some brass-framed revolvers during the Civil War.
Not only are brass-framed revolvers more apt to wear quicker, but the overall quality on brass-framed gun is generally poorer than their steel-framed counterparts.
I had a brass-framed 1851 Navy in .44 caliber more than 30 years ago. As I recall, maximum I could get in it was about 28 grains. So, if you're thinking you'll get significantly more power from the .44, as opposed to the .36, think again. The capacity to hold more powder simply is not there, compared to a Remington, Colt 1860 or Ruger Old Army.
If authenticity is not your bag, then by all means go with the Ruger Old Army. It 's tough, accurate and has a sterling reputation for quality.
If you'd like something more authentic, get a Remington 1858 or Colt 1860, if you want .44 caliber. Or a repro Colt Dragoon 3rd Model, if you want a smidgen more powder capacity.
A brass-framed .44 will be cheap to shoot, but it's almost certain to have poorer quality, and its accuracy will suffer as a result.
For a first-time cap and ball, I'd suggest a Colt 1851 or 1861 Navy in .36 caliber. The 1861, if well made, is particularly nice.
But the final determinant is your hand and eyes. If it feels good in your hand, and you like its looks, then you'll likely do well with it.