I use an Avalon AD2022, and if you want accurate and clean, it rocks. For clean with just a hint of very cool color,I like Pendulum MDP-1. The Avalon produces beaucoup clean gain, and the Pendulum sounds good. You can't go wrong in that price range with either one of those pres. I really don't like Avalon's 737 all that much. For tubes, I prefer the Pendulum. I've never gotten to use Manley, Great River, D.W. Fearn, or John Hardy (but I'll be willing to fully check out yours anytime). At that price point, none of them suck, I bet. They are all just like Christian Dior dresses. Oh, what shall I wear for the Grammys? Though I'm not as fond of the 737 as some, I do like Avalon's solid state stuff, AD2022, M-5, and U-5. The AD2022 is a good starting place if you only get one killer preamp, because it is so clean, so unforgiving. It's the only real high end pre I own, but I'm hoping to add the Pendulum soon, to have a good tube preamp. The Pendulum doesn't produce that much gain, I think 40-something db, and trim may add a little more.I'm not sure it would do well with ribbon mics. You can crank the AD2022 to +62db, add +2db more with trim, have no audible noise floor, and 32db of headroom with the needles pegged! What's not to love? You have to be stupid to clip the damn thing. It is also an absolutely *kickass* bass DI (two of them). One thing I'm sure of. Any channel as good as what you are talking about is worth getting two of. You speak of acoustic guitar- stereo good. Don't even look at one channel preamps for that application. Stereo good.-Richie