in a modern boss world i prefer the ch-1, but if you can get it a ce-2
My options are a CH-1 or a CE-5. The latter is a bit more expensive (around 10 euro) but I see not so many differences between them to decide from the youtube reviews.
such a wide choice of sounds plus its its got stero i/o, i've even been known to use mine for studio work over a spare aux.
only problem is its a bit big in comparison and is a power monster, but still its worth it for the sounds, dimesnion d and CE-1 being choice sounds all thought the rich mode is really nice. killed a supervibe in a face off, and sounded nicer than my dads vintage poly flange in chorus mode.