My primary complaint about the optima is kind of why you want one.
Though the optima is less heavy than a same size say Lifeline, it costs more.
But the amp hours per pound are the same
So you have a battery that weighs only 60% of what say a Lifeline of the same size would weigh.. It also holds 60% of the amp hours.
BUT, IF you do not use the batteries (Save for emergency stopping) and always park at full hook up sites.
And if weight is a factor
Two options are an optima, or a smaller square battery (Which would be much cheaper) OR... Let someone else install it.