Parasound Pre-amp Upgrades

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I have been enjoying the Parasound HCA-800ii and C/PT-600 that I bought from Rick (rromeo923) a while back. Much of the enjoyment has been in stretching the sound barriers. I started with re-capping the HCA-800ii after a cap failed causing it to reluctantly come out of protect. The Nichicon FG and Muse caps made a real nice improvement.

I then got the idea to re-cap the C/PT-600 with Nichicons, also with sweet results. Now I am eying the op-amps. The C/PT-600 uses JRC 4558DD which, from what I read, are much out dated and usually tossed for something better. So, that brings the question; which op-amp to use?

The LM4562 seems to have a good following but there also others in high favor. Any recommendations?

Thanks
Stan
Stan

Main 2ch:
Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

HT:
Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

Other stuff:
Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601