Here is a recommendation.
I went of both of Volcano Tours excursions recently (Eyjafjallajökull eruption jeep tour and Volcano garden Reykjanes peninsula) and can highly recommend both of them. I planned a visit to Iceland around these 2 tours and they were both fantastic. Erling's subject knowledge is extensive and everybody on both trips had a fabulous time. I will be returning again with friends and family and look forward to doing both tours again.
Alastair Ames London