Quoting kenny.: Out of interest, why do you need/want a Banner alternative? Price, reliability,size?
Only asking as I've just bought another Banner
Forgive me if I get any terminology wrong, but..
The Banner seems to lose it's charge too quickly if it isn't kept on permanent trickle charge.
Also I've found that it often doesn't (because of the above) seem to have enough oooomph (see what I mean by terminology) to turn the car over. I have a Sigma engined car and the engine has a high compression. The K Series may be similar, I don't know.
I'm not so bothered by price or weight save that the Banner does seem expensive compared to other brands such as Varta and Yuasa which seem to have a better spec?
In any event my Banner seems to have reached the end of it's life after nearly 5 years and I thought it should have lasted longer.