I'm looking for a cheap synth module that will produce analog sounds. Something nice I can mess with, preferably with a Moog-ish filter, not essentially. Something with knobs I can tweak and twist I can make some great sounds out of, but nothing incredibly fancy; I'm using it for my U20's analog tones. Mono or poly, either or, Poly would be a bit more helpful though.

Price Range of up to $120, will only go over for something special.

Please don't suggest Waldorf Pulse or any other hugely expensive synths - I don't want a full on analog synth just yet. I just need something for making decent leads, and I can use guitar pedals to further mess with the sounds.

The one that interests me the most is the MFB Synth lite, which is actually true analog mixed with digital oscillators, and not technically a modeller.
The ESQM and AN20 also interest me, but tend to go for a little above my price range (though you can easily get lucky) and contain features I might not need(expansions card, drum loops, though the drums might be nice).

I prefer twisting knobs over programming things, even if it means loosing some customisability. Not essential though, as I can use the controls on my U20.

Thank you

And please, no bloody insane "Get a Moog" type suggestions, I play guitar as well as keys and I don't make much money so I'm pretty poor XD