I have been looking at  buying a charger for a while now... I have a portable charger but I am getting tired of lugging it around since I usually go to the campgrounds every weekend.... This is my set-up..... I have one starting battery, and 2 12 volt trolling motor batteries that are connected together.....My question is can I get a 2 bank charger since the 2 trolling motor batteries are connected together? Here are the 2 I am looking at, for the money I can save, would it be worth getting the more expensive one?

http://www.davesmarineelectronics.com/index.asp?PageAction=VIEWPROD&ProdID=5297

http://www.davesmarineelectronics.com/index.asp?PageAction=VIEWPROD&ProdID=5303

sent you a PM

Are you trolling motor batteries hooked together in parallel for 12 volts? Or series for 24 volts? If they are in parallel you can put one bank to your starter and one to your trolling batteries. It will take twice and long to charge your trolling batteries. If they are hooked in series you will need to hook one bank to each trolling battery and let your outboard take care of your starting battery.

Or, you can just get a three bank charger.

It is 2 12 volt making it a 24 volt.....If I just hooked the 2 bank charger to the trolling motor and hooked a trickle charger to the cranking battery that would work also... Which one would be better though... The 20 amp charger and like a 1.5 amp trickle charger or just go ahead and get the 25 amp charger which would be roughly $75 more.....I know it is probably personal preference but I just want others opinions....  

Get the 2623a.

I bought an XPS 5/5/5 from Bass Pro and so far it has worked great.  It has brought all of my batteries to a full charge in less than 5 hours and I'm running the same set up as you.  Link is below.

http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_74190_200003004_200000000_200003000_200-3-4