I'd get the P3 (as a Planar 3 owner). For cartridges I used to use a Rega super bias, but I found a used Linn K9, which sounds better to me. The K9 was not a particularly highly regarded cartridge in its day which makes me suspect that the Rega cartridges are nothing special.
Many rega P3 owners in the UK rave about Denon DL110 or DL160 cartridges, which are relatively inexpensive. Goldrings get good press, but a friend tried one and found it a bit thin and bright, with emphasis on the surface noise.
Many rega P3 owners in the UK rave about Denon DL110 or DL160 cartridges, which are relatively inexpensive. Goldrings get good press, but a friend tried one and found it a bit thin and bright, with emphasis on the surface noise.