Need some advice please... I have a HB 565 on the boat now and it has been pretty decent for my first FF... but I"m ready to upgrade. I want a combo unit.. color.. and just more detail/power etc... i've been looking at the lowrance 520c.. which looks like a good unit, screen size seams small and it really isn't all that more powerfull then the 565. will the detail on the 520 be that much better considering it is only 400 more watts etc.? Or should i save abit more and look at a 527 or... maybe even a lcx-27c. Any thoughts on it would be appreciated... to many darn options out there.