White Industries are lovely Halo Clickster are cheaper and still pretty good plus they work fine with a 6-7-8 speed chain. I've run one for years.
Secondly the first step you should've taken to solve the wheel slipping was to replace that god awful open cam QR you have on the rear wheel. Get a decent Shimano (or similar) closed cam QR and 9 times out of 10 you won't need a chain tug/tensioner.
Also as ppl said Shimano > Hayes. Even Deore would be better in my experience.