What will beat ear 834p by a margin

I may be barking up the wrong tree. I was considering going for the GSP AUDIO ERA GOLD, or PASS XONO, OR ACOUSTECH PH-1P, OR AESTHTIX RHEA, or WHEST P20, or K and K kit, or SUTHERLAND PH.D. But I am wondering if this is a worthwhile expense? I am getting the impression that what I have is perty darn good! I can't look at the boulder or aesthetix for obvious reasons ($), so what is there that will beat the ear 834p by a big enough margin to justify the added expense? I am guessing that these may be better but which one stands out? My top choices were: GSP but EAR834P topped it, RHEA but heard its noisy, EAR 324 but heard it lacks bass headroom, PASS XONO but not quietest, WHEST but lacks micro-detail, SUTHERLAND PH.D not dynamic, EVANS GROOVE, AUDIO RESEARCH PH5, BAT VKP10, HAGERMAN TRUMPET, ART AUDIO, CARY 302, etc. Other than manley steelhead what would be considered 2nd best after boulder 2008 and aesthetix io signature. I am guessing maybe EVANS, CARY, BAT VKP10SE, AESTHETIX non signature, PASS XONO, K and K, AUDIO RESEARCH PH5 or REFERENCE, HAGERMAN TRUMPET, ASR BASIS, AYRE, CONRAD JOHNSON 15, LINN LINTO, CLEARAUDIO, HERRON VTPH1, ARTEMIS, ROWLAND CADENCE or do I stick with EAR834P. . And can the IO be upgraded from non to signature, and the BAT VK P10 to an se. And is the K and K really that good, is it much better than an EAR834P?