I had an MHDT havana (supposedly a step up from the Paradisea) in my system and recently purchased one again to play around with. I think, for the money, they make great DACs. It may not have the amount of detail retrieval as my Bel Canto Dac3, or the fullness to the bass, but it's not far off, and considering the retail is less than 1/3rd of the bel canto, that's pretty amazing. I've had the Benchmark, which I didn't love, and the only thing I know of the Cambridge and the PS Audio is from reviews, so taken with an extreme grain of salt.
My guess is--and it's precisely that, a guess, since I don't know what the rest of your system is like, etc-- that as you're an analog person, you would probably like the MHDT gear, but that doesn't mean you wouldn't like one of the other dacs you mentioned. I don't find the MHDT Havana stereotypically tubey, so I don't think it will slow down your system, unless it already sounds that way.
My guess is--and it's precisely that, a guess, since I don't know what the rest of your system is like, etc-- that as you're an analog person, you would probably like the MHDT gear, but that doesn't mean you wouldn't like one of the other dacs you mentioned. I don't find the MHDT Havana stereotypically tubey, so I don't think it will slow down your system, unless it already sounds that way.