making hash blender

Should I get a milk shake mixer or a good blender to make malts/shakes?
I only have a cheap blender and I can not make a thick or even semi thick shake with it. So I would like to know if I should get a milkshake mixer like this… http://cgi.ebay.com/RETRO-HAMILTON-BEACH-DRINK-MIXER-MILKSHAKE-MAKER-Chrome_W0QQitemZ190261133886QQcmdZViewItemQQptZSmall_Kitchen_Appliances_US?hash=item190261133886&_trksid=p3286.c0.m14&_trkparms=72%3A1205|66%3A2|65%3A12|39%3A1|240%3A1318
or should I just get a good blender from Walmart or somewhere??
A good blender would work fine. I’ve never had any problem making milkshakes in any of the blenders we’ve ever owned. It just seems like it’d be more of a pain to buy a specific piece of equipment just for that one thing.
part 2 blender hash