Front End Creaks

[X5Dude]

I have an issue that I can't get figured out. My 2002 4.4 X5 has 170K miles and it's still going strong. However, when I accelerate quickly or do anything that applies a lot of torque I hear a chunking noise. It sounds almost like something it hitting the undercarriage.

One mechanic told me I had a bent axle... another told me that I need to replace my lower control arms. The second guy went so far as to show me the worn bushings, but said that the bushings couldn't be replaced alone. They whole control arm needs replacing.

I'm no car genius, but I am not sure that either of these guys got it right. I found bushings online (any recommendations on brands) for reasonable prices. I'm willing to do whatever it takes to get back up and running properly... just wondering if the Gurus here have any advice.

Thanks!