having owned a Hexar (oh why, oh why did I sell mine - it was a Rodium one!) I'd say not much..
Rocoh Gr1/Gr1s - but are they cheaper?
Olympus XA - but no autofocus or autowind...but just as quiet as a Hexar in "stealth" mode..
If you can live without aperture priority then any of the following are great - Pentax Espio Mini, Canon MC, Canon AF35M, Olympus Mju, Ricoh R1, Minolta AF-C, Konica A4, Samsung AF Slim..