best way to do bed edging

[Evergreen Lawn Care]

I was thinking that I may get a bed edger to cut time and I was llookn at Turfco. Does anyone use that one or another they could recommend? Or if you have one which is faster, a shovel or an edger ?

[AZTLANLC]

I try a bed shaper from a friend of mine, and definelty is worth the $4,000.00 or so, they say you can do 100 linear feet in one minute and is pretty close, try that with a shovel.

[Yardboy]

Which kind is a good one(s) to look for?