Well I finally Decided On the Front Sonar
I ended up getting a Lowrance X100C which is last years model. This year it's a X102C which has more pixels, but the X100C was on sale at Cabelas for $379 so I took it. The new X102C is also $499 so I give up a few pixels and save a $120.
This will be my first experience with a color unit so I can't wait to get it here in a few days.
I also am going to have it fixed to move back and forth from the front and the console and use my LMS 480 map with the X100C as the sonar. This should let me view sonar at any speed on my pontoon since the transponder will be at the front. Which as any of you that have or know the pontoons sonar mounted in the rear don't read while moving very fast at all.
So thanks for you guys help to get me off buying the bottom line sonar.