I agree with Box. As you're not running monster compression requiring a huge cold cranking amp rating on the battery, I'd say the trickle charger is more important than the type of battery. I use the Ctek charger and it not only maintains my car and motorbike batteries perfectly, but it also kicked an Odyssey battery into life after it had been flat and unused for 5 years.
Ctek MXS5.0 Battery Charger