You might also consider a MAKO speargun. Probably a 120 cm gun would be best. Our Oceanic gun has an enclosed track which makes loading the shaft fast and simple and prevents any shaft whip. The gun shoots where you point it.
We have all stainless trigger, sear and line release, a 3-yr unlimited warranty and we use the best carbon steel shafts available- harder and stiffer than what is used on either of the guns you mentioned.
Since we sell direct, with no retail stores- we have eliminated the middle man at the retail level and pass on the savings to you. Our guns are made to your specifications, on the day you order it - all bands are hand tied (when ordered) so they are as fresh as possible. (free shipping too).
Do a little research and if you have any questions, we are always happy to provide one on one guidance. Give us a call during normal business hours if you have any questions.
http://www.makospearguns.com/the-mako-direct-story-a/292.htm