Need a Preamp Recommendation

Newbie here, please bear with me. 2 channel system:

PSB Image T45 speakers and a Onkyo M-282 200 watt amp. I am currently using an old pioneer receiver for the preamp. Looking to upgrade on a budget. Would this change the sound drastically? If so, what are some recommendations?

Thanks in advance.
What kind of music do you enjoy? What is the range of your budget? What kind of sound improvements do you expect to get?
Check a passive preamp if possible (Axiom, Monolithic, etc..), otherwise a used Adcom or Rotel will do,considering you are not into vinyl..... yet!.