I like the panels, not keen on the controller, not a clue about the mounting bits and pieces and wiring with the kit. (Generally I don't think much of kits. Would rather pick own components.)
The controller is maybe going out of production? --must be on sale at this place for a reason. ISTR this controller was mentioned before and it has some limitations wrt input voltage? --was something not right about it- whatever--others will know better if I am on the wrong track here.
IMO you could get the panels and select a controller of your own. With those two panels you have an option to go series 24v MPPT or parallel them for 12v PWM (way less controller cost, nearly the same amp hours a day)
http://www.wegosolar.com/categories.php?category=Inventory-ClearanceThe mounting bits and pieces discussion came up in a thread mena661 had going recently. Should review that. Most of those kits have the wrong pieces was the main point ISTR
If you have as much panel as you need tilted, then twice the panels lying flat you should still be at least as well off, so IMO you don't need the tilt. Might come in handy though.