Recently bought a second hand Rega P6 (less than 2 years old) and the Exact cartridge probably needs replacing. Am toying with either Nagaoka MP-150 or a Goldring 1042 as an alternative to the Exact 2 (which was supplied with the original purchase). Would be good to hear anyone's thoughts about using something other than a Rega cartridge. Doesn't have to be the ones named in this post. I would like to stick with MM (for cost really - don't want to get a MC pre-amp). Have a Marantz PM7000n amplifier, Rega Fono pre-amp and KEF LS50 speakers.