For hunting purposes I would head more towards 2-7x33 or 3-9x40 over a 1-4, 6 or 8 x24 (30mm tube).
As the larger objective will gather more light, you say you will be using an illuminated reticle, so I assume its in low light or under a spot light?
The 1-4x20 (1" tubes) are pretty lousy for light gathering.
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