Originally posted by Tone
Red top is not holding up to the strain either so I am switching to the yellow very soon.
You might want to consider the blue top "marine" line.

I compared the biggest yellow, the D34 to the blue D34M and spec-wise they seemed identical both at 750 cold-cranking amps and you can easily fit the next step up blue-top, the D31M with 900 cold-cranking amps in the VX, I know this because that's what I have now - just takes a new bracket to go over the top of the battery, about $5 from autozone. Plus, being a marine battery you get an extra set of terminals in case you need to hook something else up temporarily.