I have a T15 set but have been wanting to buy a second drill - primarily to not keep changing chucks and bits when switching between drilling and driving. I ordered a CXS (basic) & Centrotec set yesterday and it is on its way but thinking if i should return the CXS and get a C18 basic instead. I do not need extra chucks or batteries, and the difference in price is not too much between the two ($300 vs $235). The C18 might be more robust and I'll have the option of buying 18V battery if I ever wanted more torque. Wanted to get some advice from folks who may have faced this dilemma before. What would you suggest? Thanks.