Next Upgrade??

rar1, thanks for the perspective. I can't say that anything bothers me about my system. it images fairly well, good bass, definitely loud enough. Just always looking for a little better. 

mijostyn, in the long run looking to make improvements. would like to ultimately go balanced which will likely make some difference. this will require a change in preamp, likely rogue rp-7 at some point. same for TT and phono stage. I feel like my speakers will support a better source at some point but to get a real noticeable difference I'd likely need to spent 10k or so on a table/tonearm I'm thinking. was looking for a small step I could make in the short term

thanks everyone for the input! @mulveling, you have a lot of good infor for me. I've been a rogue guy for 20 years and have had nothing but positive experiences. My goal is ultimately to have an RP-7 and maybe that's a better move than a new cartridge. Like @flatblackroind said, use the one I have till it wears out and then upgrade. It's a nice cartridge and it seems like the distributor always let's you upgrade which leaves that door open for later. 

Upgrading my amps is not super high on my list. My speakers are a fairly easy load so I don't need the extra power the Apollo's would give me. Might go stepwise to darks but am likely to upgrade my TT before that.

This has been really helpful. Thinking maybe preamp before cartridge at this point and then upgrade cartridge in 1k hours. might also do the linear power supply in the meantime.