Replying to Lens help!

Im looking around for a good crisp picture lens! I'll be filming updates videos for a band so it needs to be pretty wide but no distortion. I almost want to got fixed if I have to.

Heres a few option I have looked at:

http://www.amazon.com/gp/product/B002D2VS9U/ref=s9_simh_gw_p23_d0_i7?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=148XXDK9DEK31C6GED49&pf_rd_t=101&pf_rd_p=470938631&pf_rd_i=507846

I have a kit lens and a 50mm so I was thinking maybe get the fisheye just to have another look?

http://www.amazon.com/Rokinon-FE8M-C-Fisheye-Canon-Black/dp/B002LTXQUE/ref=sr_1_15?ie=UTF8&qid=1307304826&sr=8-15

I'm not sure what to go with. any recommendations?


Thanks,
Matt