Considering another PCP

I am considering adding another PCP too my collection.
The leading contender is a Crown MKII. The other option is a 22 Maverick Compact that my wife abandoned after getting her M3. I have thought about converting it instead.
The question is what caliber.
I currently have a 22 slug gun and a 25 compact pellet shooter. For some reason and not necessarily a good one I am drawn to the 30. The other option is a 25 cal set up.
I am wanting to put together another slug shooter. Talk me into or out of the 30 cal. Cost of projectiles is not a factor. I am wanting considerations on ballistics down range accuracy etc.