Sly,
I am not sure that I want to do this but here goes, do yourself a favor and check out the Humminbird 787c. It is a combo like you are looking for.
I am the first to say that Humminbird didn’t hold up to the Lowrance units a few years back. When Minnkota bought them, all has changed!!!!! That screen on the 787c is second to none, I’ve fished with several Lowrance color units in the past year from other people’s boats and they are very nice. Lowrance makes a nice unit BUT, BUT, BUT, I’ll take my 787c any day of the week! I can have direct sunlight on the screen and still see it from an angle. I just haven’t seen a Lowrance that you can do that with. I am sure they make them and I know that most guys on this site are Lowrance guys but I’ll stand alone and say the impossible, right now for under a $1,000 Humminbird is the best. There I said it, let the attacks begin! Yes Lowrance guys, I know, I know Lowrance out sells Humminbird in high end units. That doesn’t make them better.
As far as the chip goes, I’ve got the 06 chip and it has a Hotspots map of pool 4 but nothing for 5 or 5a. I got the chip mid summer and never got a chance to fish any further south.
Hope that helps, just my two cents, now let the Lowrance guys tear me apart. But before you hang me, please understand I think Lowrance makes a nice unit. I think the Lowrance products are just fine if that is what you want to buy, but please understand that just like the boat debate of who’s is the best, some people might disagree.