Best Dog Collars

I Want To Put My German Shepherd On A Really Long Lead (about 50ft Or More) On The Field So I Can Throw Balls For Her Etc Without Being Worried She Will Run Into The Road Or Get Into Trouble In The Ponds There. She Hasnt Learned Recall Yet So I Would Like To Know Which Are The Best Collars (ie Those That Clip Together Or With A Prong Through A Hole Like This Http://www.thehuntinglife.com/html/links/advertisers/dog-collars.html.)and Strongest Leads So That I Know They Wont Tear Or Come Off If She Runs.



Thanks For Any Advice
She Wont Run And Snap Her Neck, She Learns That When I Say Steady She Slows Right Down And Never Pulls To The End Of The Lead Actually So Will Not Die.

I Just Want To Know Which Are The Best Collars