Personally, if you don't want to wait a little bit until you have the funds for the ESP, I'd be tempted to go for the KinGrinder K4 in the meanwhile (at around the same price as the electric grinder you've pointed to), which gets good reports here. Yes, it's manual--if you can deal with that (e.g. you're not routinely doing numerous multiple shots at a time, which might prove tiresome), people here have reported favorably on its grinding capability. And it would continue to serve you later, in your ESP era.
The KinGrinder K4 is on sale for $88 USD on Amazon US. You click a coupon in the body of the listing to save $30 bucks. All of the KinGrinders are on sale.
Not sure if this is allowed but I found the Kingrinder K4 available and on sale at Amazon for $88