Yes I do prefer the Rain-Bird over the Hunter. I sell both, and I have given you my best / unbiased opinion. There will be many who may disagree, but the facts are clear. Rain-Bird has a 5 year warranty, tried and true (no major design changes in the last 15 - 20 years) and so forth and so on..... Hunter only has a 3 year warranty and the Pro Spray has only ben on the market for about 5-7 years.
Don't get me wrong, they are both quality heads. Usually when picking a product that is as important as irrigation heads, one would normally pick what is predominate in their area (ease of finding parts or exact replacements). But in this case Rain-Bird and Hunter are both widely available in all markets. In the case of your pop-up spray bodies, I would stick with buying them from a supply house in your area, not a Home Depot or Lowe's. The products may look the same, but in almost all cases they are not. If you do not have a local supply house (wholesale distributor) you could order them through Sprinkler Warehouse (click on banner above).
Best of Luck!
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Josh
Irrigation /Landscape Lighting / Pump and Well Specialist