Likya 2 Teker has good quality bikes, although top end of market. The manager is knowledgable and helpful. He also arranges rides most Sundays that you could join in if you wished.
Have bought here. Quality and service excellent, if a little pricey. The 'Geotech' labelled bikes are generally good quality and affordable.
There is also a new one just around the corner, which sells decent stuff. The owner is approachable, although I haven't bought anything there, so can't vouch for it.
As hotlips said, if you just want it to 'hop to the shop', then a supermarket bike will probably suffice. Cheap and cheerful, if rather heavy.