With 6CA7's I've got vintage Sylvania's, RCA's, JAN Philips ECG, GE and had US Tung-Sol's. The only current production ones I've tried have been JJ and maybe EHX (can't remember 100%). IMO the vintage American 6CA7's are little different than the JJ ones (can't say for other current ones). To me they sound more scooped, hollow compared to EL34's (that can maybe be the smoothness you're talking about. Definitely smoother/less aggressive mids), but more glassy, more extended lows. To me it's sorta like an EL34 more in the 6L6's direction. I hear them as less chewy, but maybe it's a semantic thing or maybe other current 6CA7's are different
Maybe a different version XTC could be within your budget, but I've not at all kept up with what any of the XTC's go for
I agree. I never found the Shiva's unforgiving. I can see some maybe finding the 20th Congested in some setting, but I never thought that. For me it was more that I would compare various Shiva's to things like my the Cameron modded Marshall's I had, vintage Fender's and a few other amps I had and while the Shiva's I thought were very nice amps, they just to me came off not as organic, raw or inspiring to me in comparison. I find Bogner's (except the Helios & Telos) smooth and polite for my taste, like they're always holding back a little. Even my Rev 1 Uberschall, as brutal and evil as it is, (and still one of my top 5 favorites) also still has that smooth, polished thing about it that I would prefer if it wasn't there