Well I contacted the sales people at "Best Converter" and explained what I was looking for. They recommended the "Boondocker" PM4B-55 MBA replacement unit. At $159 + $43 shipping I decided to pull the trigger. I did not find anything negative about this Boondocker and did read good reviews of this "Best Converter" site. I also returned my Walmart $111 battery and have ordered an exact replacement battery to match the one I bought earlier this year ($109 in Edmonton at the Battery Doctor - $165 locally in town, going to the city on the 1st anyway so will pick it up then). Returned the Genmini2 as well. I do have 80 watts of solar panels to keep the charge up on the batteries. I know that won't be enough to keep them full while boondocking but will extend my camping time a little I hope. I'll see how well this Coleman pair of 40 watt panels works. Maybe I'll need to add another couple of panels.
Thanks for all the advice.
Will post the installation with pictures once the unit arrives.
