Fish Finder & GPS

Hello Fellow Kayakers!  I finally dropped some money on a kayak after several years of kicking out on my boogie board.
Spearfishing is so freaking awesome!  My kayak of choice is the Cobra Expedition.   I have the necessary equipment but just need recommendations for a good fish finder and GPS unit.  If you get one toy, why not another?   

What do you guys recommend?  I'm hoping to spend less than $500 for the whole setup. 

Thanks!

Will the FF/GPS be used for diving only or do you plan on needing/wanting it for deeper water (say over 100')?  You can get a nice unit, in color, for under $500.

I have a Humminbird 383c Combo for sale $200. It is a color unit with integrated GPS. Full specs here: http://store.humminbird.com/products/307019/383c_Combo_Portable. Includes fish finder, mounting head, transducer, power cable, battery, carrying case, instruction manual.

Everything can be taken out of the carrying case and mounted to your kayak, which is how I used it.

Hello Fellow Kayakers!  I finally dropped some money on a kayak after several years of kicking out on my boogie board.
Spearfishing is so freaking awesome!  My kayak of choice is the Cobra Expedition.   I have the necessary equipment but just need recommendations for a good fish finder and GPS unit.  If you get one toy, why not another?   

What do you guys recommend?  I'm hoping to spend less than $500 for the whole setup. 

Thanks!

on cabelas.com in the sale,the Lowrance elite 5 dsi GPS combo is on sale 379.5" color downscan with GPS is a great deal.id buy it but I'm broke right now

I picked up a Lowrance elite 5 gold from West Marine a couple weeks ago. 170 bucks off retail. Not sure if the sale is still on. I love this unit.

Hello Fellow Kayakers!  I finally dropped some money on a kayak after several years of kicking out on my boogie board.
Spearfishing is so freaking awesome!  My kayak of choice is the Cobra Expedition.   I have the necessary equipment but just need recommendations for a good fish finder and GPS unit.  If you get one toy, why not another?   

What do you guys recommend?  I'm hoping to spend less than $500 for the whole setup. 

Thanks!

Noticed they have a sale today.
http://www.westmarine.com/webapp/wcs/stores/servlet/SiteSearchView?Ne=2000000&Ns=Most+Popular|0&beginIndex=0&langId=-1&storeId=11151&page=CategoryDisplayLevel1&N=377+710+2050157&catalogId=10001&cid=E130517_Electronics