same exact here. I felt the med reign was too small, and I'm exactly the same size as you- 5'10" and 195 (okay, 200), but with 'I need to custom order dress shirts' long arms. I am definitely happy I went with the L.5' 10" 195# went w large (i also have pretty long arms). Med felt really small to me and LBS insisted that if i plan to pedal a lot i needed the LG. Giant rep agreed with them. I have no complaints .