Help! Receiver or preamp? Im overwhelmed...


I need some help. Been gone for years and much has changed and Im just overwhelmed with the years of info on the forums. I dont want to make a foolish decision and would so appreciate the communities gracious knowledge and assistance.

Im 75% music and 25% HT. 

Gear:
Paradigm Studio 100 v4 mains Paradigm CC690 center 
Paradigm V2monitor surrounds
SVS PB13 Ultra Sub
Emotiva XPA 5 amp (200x5)
Keeping all the above

The old 5 channel Rotel HT1055 receiver (no HDMI) needs to upgrade even though I love the sound! Im fine with 5.1 and not interested in Atmos. Im also fine with a used item. What do you reccomend for some killer sound and updated HDMI?

jsbranham7
Thank you SO very much gentleman! I should also mention I will be keeping the Rotel (Not that it matters). As for the budget, I'm guessing up to $1000 would snag me an excellent unit in the used market? I do not play vinyl so that will not be a concern.

As far as video I'm guessing I want to be able to upgrade to a minimum of 4k handling ability, correct? And honestly, to play music we use either a Playstation 3 and 4 for discs and use it to access the internet for music sites and use the optic connection to the receiver. We even use an old Toshiba HD-XA2 for upconverting old movie content and some audio through it as well as it has a Burr Brown Dac. Use Playstation 3 and 4 for online music, movies, games etc. 

So yes, this boat has oars and we are probably missing out on a lot! For heaven's sake, I'm still using my speakers with one set of cables instead of Bi-wiring. So I need to learn about that too...Shew, work, and family have made me quite illiterate in the HT game, but I'm keeping faith there is potential!    
Would a Marantz SR5014 or SR7012 be a good choice? Or would the audio not be as satisfying as Rotel? What older Anthem unit would be a good choice? I like music to be very dynamic and hard-hitting...

Marantz NR1510 UHD AV Receiver...What about this? Since I have an XPA 5 Amp?
 

"... What do you recommend for some killer sound..."

I’ll just spit it out and let the chips fly. A two channel system with a good pre-amp and power amp.

Edit: Sorry I didn't know I was in the Home Theater group...but I said it so I wont take it back. Just ignore me. 
I’m thinking pre-amp/processor as well Russ. No worries brother. I’m in desperate need of advice as I’m 200 miles from any pro audio places. Much appreciated!
jsbranham7 - I think you may have mentioned some options that might really work for you.  For starters, that Marantz SR7012 just might do it for you.  We happen to have a den w/ Paradigm Studio 100s up front, Paradigm Studio center & surrounds, and an SVS sub.  We've gone both ways w/ an external amp - B&K or Odyssey.  And right now it's neither of them - we're bi-amp'ing the front channels directly from the 7012.  Got that SR7012 on an absolutely super deal (so that may help a little to make things sound darned decent to one of us).  Anthem is good stuff, too - that's prob. my next choice (but it'll never beat the price for our 7012).  If you can get such a deal or try 'em either could be highly recommended.