Was looking at a Lowrance x-4 or maybe a Humminbird 150. Never got into using fish finders much so I was wondering if you fellas had any suggestions?

http://store.humminbird.com/products/356206/385ci_Combo_Kayak

This is the kayak i own:

http://www.modells.com/product/index.jsp?productId=3471608&CAWELAID=305578788

Thanks wayne but a bit out of my price range, was lookin for something around 100. But would it be okay to put a battery in my kind of sit in kayak? It's only 10.5ft long. Wondering if there is anything that is powered by like double As or something.

I have an Eagle 320C color fishfinder on my Hobie Mirage Sport sit-on-top, powered with a 12V gel cell battery. I paid around $200 for mine several years ago, but I've seen them new in the box on eBay for around $100 recently. It's great little unit for a kayak, and I've never had an trouble seeing the screen with polarized glasses. It's mounted on a RAM mount so I can reposition it as I need it and I ran the transducer through a scupper hole so I still get an accurate surface temperature reading. The battery sits inside a tupperware container to keep it dry, with quick disconnect on the cable so I can remove it for charging. Hope that helps...

Any sonor unit can be used on any craft including a tube. All you need is a way to hold the display and transducer plus a 12V power supply.

The X-4 would work find, just get a flat faced tranducer like the type used on trolling motors for ease of use.