you get what you pay for, so if you are paying 6.39 or something, don't expect too much in terms of support and extras. Hard to earn money with a margin of a couple pennies. I suggest considering the fact price isnt everything.
Low features, low rate domain fees, what to choose?
Thats easy. Directi if you want no extra services. The question I would pose though is what will Directi do with the proposed ICANN fee hikes? Pass along the cost to the customers? Their profit margin is so small as it is that is why they are the lead opposition.