Depth/Fish finders

I’m looking to get a new one. What are the top spec’s I should look for?

This might help you a bit. The product review section here is a great place to start to find info on products you might have questions on. These products you see there where put to the test and all you need to do is read about the findings.
http://www.in-depthangling.com/reviewpost/showproduct.php?product=9&sort=1&thecat=12

I guess I was looking for the most important features. For instance, is the # of pixels on your display more important than the # of watts in your signal strength? (fishmark 320 vs garmin 240) and then how do you compare these to a Bottom Line ?

Thanks for the info!

Checkout http://www.lowrance.com and go to the sonar tutorial. This will answer most of your questions. The things I look for are high power, sensitivity, and high resolution. I have 2 Garmin 240’s on my boat now. For about 7 years I ran a bottomline 210. Both units performed up to my expectations. I have rigged a few boats with the Eagle fishmarks, and have seen them operate on the water. I was satisfied with their performance but I have seen some defects after a short time. This may just be coincidence.
If you have any other questions, give me a holler.

Check out the Vexilar Edge 507. I look for a locator thats going to show me fish. The Edge does this with it’s dual transducer concept. See my review in the review forum.

Good Luck