Looking for a change.

System details?  Cables? Room?

I think your Yamaha is an excellent unit. The changes you consider all cost money. With whatever amount you may consider spending on a component upgrade  I recommend you check out an MIT power cord in that price range. I believe you'll enjoy the experience- and money spent on getting great energy to your components is like a permanent upgrade. I've noticed an MIT Oracle Z-lll for $425 for 2 meter. It will likely 'startle' you  :)   ( I am not in the hifi biz in any way :)

@chasda 

Your electronics are the weakest link in your audio chain.  Also. Have you addressed room treatment?

For specific component suggestions, your budget, what sound you’re dissatisfied with, what sound do you want more of, type of music listened to, and your preference for tubes vs SS

I've enjoyed reading your comments and perspectives. Some have asked about my equipment, if you read my original post it's all spelled out there. Some have suggested brands that I would consider a lateral move not a move up. As far as my cables and room, my interconnects are mostly Audio Quest, except the subs which are SVS cables. My budget is not a problem since anything I purchase I will probably get a good deal with my connections through dealer friends. My phono amp is a hybrid tube, I would consider a tube integrated and I do have a Prima Luna source. My musical tastes are anything from early jazz to classic rock and a lot in between. My room could use help, but since it's acually a part of my house, changes can be difficult. Dimesions are 17x15 with vauled ceilings as high as 16 ft. and open on 2 sides. It's carpeted and furnished but I assume the ceilings are an issue. Someone made a comment about power supply and that made me think. Should I consider a power conditioner and power cords before I make changes in my integrated amp? Do power conditioners really work and are they worth the money? Right now everything is just plugged into a power strip then into the wall.

I have no brand recommendations.  However, don't use your Yamaha as a pre-only, at least not for very long.  Integrated units are made to match the pre- and the power- stages...the pre-outs are just for convenience, or subwoofers, or whatever. 

If you want a step up get a better integrated or go fully separates...