"Rega 6 w an upgraded Kiseki Blue"
Have you heard that setup? If it sounds good to you, that's great, but likely you can find a combination of a Rega with a Rega cart for a LOT less.
That's an odd pairing-a $2500 MC cartridge on a $1900 table w an arm that DOESN"T have adjustments to take advantage of it.
If you decide on a Rega, you're best bet is usung a Rega MC cartidge with it. Using a non Rega cartridge defeats the Rega concept of simplicity and ease of use.
Unless that dealer is selling it for a comparable price to this(which is highly unlikely)I would pass.
Rega - Planar 6 Turntable (Ania) - Music Direct
Package deal that's pretty much plug and play. Just set tracking force and antiskate.
You don't need all the above recommendations for the Rega. Just a tracking force gauge.
The Rega will be a smart choice for a first table- setup within 10 minutes without any real fuss.
Kiseki Blue is more appropriate for a non Rega table-$3K+. IMO
When you get into upper level tables/carts, using an outboard phono stage, and not the internal as you are doing is the next step.