Op amps for a Hagerman Bugle?

I have two Bottlehead Seductions, a Hagerman Cornet and a Transcendent Sound phono preamp, all parts-upgraded to the hilt, based on expert advice. I've recently built a second Hagerman Bugle, after a first sounded so good, and put in TS2352 Vishays, .22 uF Russian Teflons and a couple of other upgrades. It sounds as good, at least, as any of my other phono preamps. I wonder about changing op amps to make it even better, and would be grateful if anyone could advise me on this. This is a remarkable design, and a huge bargain. I have a chassis design I'd be glad to pass on--calls for some carpentry, a table saw or the like, but doable. Pics of that on request. Thanks for any help on the op amp question.