Good morning, during the upcoming weeks i will have the chance to test my three left-over acoustic guitar choices. I was looking for a balanced tone for finger-picking and a little strumming. A pickup system was no "must need". Candidates: Cole Clark FL 2 (Sitka / Rosewood) Martin D-18 (Sitka / Mahogany) Martin OM-21 (Sitka / Rosewood) So i don't know that much 'bout the different guitars. Are there any things i need to know before playing them?