3.0_TDI_C6

Hello everyone I have been the fortunate owner of an A6 C6 3.0 tdi quattro for the last year and 3 months with (surprisingly and thankfully) no issues. The time has come to change the control arms (both front and rear) After some research I am still yet to arrive to a decision so I thought I would ask the Audi community for some advice to best help me I understand lemforder is an OEM supplier to Audi but the pricing of febi bilstein products are tempting, especially given the fact to change all the control arms including labor would cost as much as I bought the car for. Has anyone used febi bilstein parts, specifically for controls arms and what is your experience with them? Which site would you all recommend I purchase the parts from (autodoc vs GSF vs eurocarparts vs etc)? Any other suspension components worth changing while it is all apart or should I just purchase a full kit? How much should I budget for labor? And last any specialists or even general independent garages garages you would recommend in the Worcestershire area (or even slightly further afield if highly rated)? Apologies for the onslaught of messages and any help is greatly appreciated!