SLP98 mods and upgrades

I recently purchased a new SLP98P preamp. The phono section needs repair and while the unit is back at Cary I am considering some of the Cary upgrades including. (will try NOS tubes later):
-Jensen Oil Copper coupling caps
-Audio One output caps
-hexfreds
-direct coupled option

Any suggestions on what is the best combination of changes to give the most improvement for the money. I have built a number of kits and DIY projects so installing caps is not an issue but I would need some guidance on what caps to replace including physical locaton. I especially don't know much about the direct coupled option.

After a short period of time listening to the preamp my initial impression is positive. I would prefer a smoother (not less detailed) top end and better bass - both definition and impact. It is also possible the preamp is not completely broken in.

Rest of system is Aerial 6 speakers, CJ 2250, Naim CD5, LP12. Also trying Spendor S6e speakers and AES Six Pac amps. I enjoy mostly rock and jazz and some classical.

Thanks,
Roy