New TT vs Cartridge/isolation upgrade

Hi all,

I'm contemplating an upgrade to my Pro-Ject RPM 1 Carbon turntable.  Goal is to achieve a warmer sound with better imaging and soundstaging.  I'm considering two options, both of which would cost me about $600:

1:  Keep the RPM 1, replace the stock Ortofon 2M Red cartridge with Hana EH and add an isolation platform that would allow me to better level the turntable.

2:  Sell the RPM 1 and replace with a stock Pro-Ject Debut Pro, which ships with a Sumiko Ranier cartridge.  The Debut Pro has adjustable feet, which would make the isolation platform less vital (either TT will sit on a pretty solid wooden credenza).

Any thoughts on which path is best?  Basically the question is whether upgrading the RPM 1 or moving to a Debut Pro will yield better sound.