Humminbird 500 series?

Hey everyone

I recently got a trident so now I'm going to put in a new fishfinder for it.

383c too much money and power draw - dont think i really need it.

What do you think of the 500 series?  Of them which is worth it?

Is there a significant difference between the 525, 535?  is it only temp?  Does the XTH 9 20 provide temp readings?

does the 565 have any extra features except for dual beam capability?

The 565 is dual beam and the thru scupper setup does provide temp...it is a great setup.  I use the 580c and it is killer.

I'm also considering the 535. Need a FF for my P13. The body looks the same as the Matrix series--my Matrix 37 has lasted about 40 saltwater trips and still kicking. Pretty solid.