In reply to Adam Moroz: We didn't make it out there, but people raving about Loja in the El Chorro guide. Depending on wind direction, there's probably climbing at Sector Suiza on Las Frontales, El Chorro, and at Desplomlandia - Buena Sombre and El Triangulo.
Poema de Roca does have quite a good range of grades, but probably wouldn't keep you going for more than a few days.
Good luck