I'd take the HS cover and Cover Cradle at that price and run!!! Regardless of a "perfect fit", which most after market cover manufacturers can get, that's a great price! Not only that, but the Cover Cradle is a lot easier to use since it has hydraulic assists on the back.
FYI, that combo would be closer to $900 through my company, install not included.
The only after market cover I would recommend would be one made by SunStar, since their 3 year warranty includes not only manufacturers defects but also water logging. As far as I know, no other cover will warranty that.
Good luck!