The P bass was the first, and I think what we all like about it is while there are certainly ways to change the design those p basses were the start of it all. The OP's rick is another very signature sound and it not sitting in the mix is not the reason to buy a bass. The engineer can eq it, you can tweak the sound but a Rickenbacker isn't exactly a low quality instrument and it's still around cause it can sure "sit in a mix."
That being said, because they're different tonally one can easily justify to girlfriend, fiancée, wife, or general overseer of the finances if you have one (I do...). And if you are gonna spend the money on an American standard I would highly suggest trying to get your hand on a G and L LB-100. This was Leo Fenders reinvention of the P bass and I've been borrowing a pastors to use at church (I bought the rig, he supplies the bass) and it sounds better than any P bass I've played made in the last 50 years.
That being said, because they're different tonally one can easily justify to girlfriend, fiancée, wife, or general overseer of the finances if you have one (I do...). And if you are gonna spend the money on an American standard I would highly suggest trying to get your hand on a G and L LB-100. This was Leo Fenders reinvention of the P bass and I've been borrowing a pastors to use at church (I bought the rig, he supplies the bass) and it sounds better than any P bass I've played made in the last 50 years.