Just got back a week ago. I stayed at Lambrinos last year, and it is great, but a little higher priced than many studios. Depends what you want. There is a cluster of a bunch of studios (Fatolitis, Dimitrakis, Avra, Irene, Sakis and more) around Fatolitis place which is a central bar/cafe hangout for climbers. The area is a little noisy at night. If you want a little more quiet, Lambrinos and Armeos is good.
If you don't mind a walk or are renting a scooter anyway, some places in Myrties can be had a little cheaper. If you want to rent a scooter, some places require a motorcycle and international drivers license, some just an international permit, some you can sneak by without, but this is risky if anything happens. By law, you need the international permit to drive in Greece.
6a-c+ is kind of my range and what I was seeking out on this trip. 6a-b can be had at a lot of locations. Most in this range are slabby face routes, but some locations have 6b-6c+ "wall climbs" which tend to be vertical to slightly overhanging, then there are the cave, tufa/overhangs.
These immediately come to mind, but are not the only places for this range:
Slab: Poets, Afternoon, Iliada, Arhi, Ghost Kitchen, Stankill.
"Wall climbs": Spartan, Stankill, Iannis, Iliada. Arginonta
More overhanging, cave, tufa to 6c+: Panorama, Odyssey, Ghost kitchen, Secret Garden, Arhi.