pH meters?

[Wrench]

I'm looking to pick up pH monitor instead of using the liquid test kits. What models come reccomended? I found this one on ebay that looks nice, http://cgi.ebay.com/HANNA-HI991401-...ryZ43555QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Does anyone have any experience with this brand or particular item?

 

[Pescados]

reef geek has these on sale for 59.99

http://www.reefgeek.com/product/pH_Monitor_w!_Probe_by_Reef_Fanatic