Look forward to hearing "if they're worth it". I would think you'd have plenty of clearance with 1" rings, but if you know the base height there is a great little mount height calculator on this site, but basically just take the distance the objective bell (outside diameter) will hang below the bottom of the main scope tube and you need to float this height plus lens cover over the barrel. For example:

50mm objective on 30mm tube -- Depending on brand, maybe 56mm outside diameter plus 2.5mm for lens cap (approximate numbers for the point of example) -- that means you have 15.5mm or .61" of scope and cover to float with your rings and bases -- depending on the length of the scope (and shape) you may or may not have to add a bit for barrel nut clearance. If you do better go with .75" clearance needed, bases range from a couple tenths to half an inch, so subtract your base height from that number and you know how tall your rings need to be.

To get the scope float total (.61" in this example), take your (outside objective diamter)/2 - (main tube diameter)/2, or 28-15 in this example, then add in lens cover allowance and barrel nut. Remember this will give you a tight fit, you probably want 1/8" or so clearance, but this is personal preference.