GU Duel Battery System with Deep Cycle Battery

[Bacho86]

Battery wise, given it will be under the bonnet I'm staying away from the AGM / Gel type batteries and sticking with the cheaper older tech batteries.

I'm tossing up between a deep cycle battery or a marine type battery which gives a good combined cracking power with deep cycle. I've had a read on this website which provided some good information on batteries which are suitable for under bonnet installations http://www.everybattery.com.au/deep_...s_auto_4wd.php

There are so many different types and variants out there, so its a bit of a mine field I think, but options currently being considered are:

Exide Stowaway (ST27DC95) - 680 CCA and 95 A?H for $224

Delkor D31 Lead Calcium Deep Cycle 100Ah $270

Supercharge All rounder (MRV70L) - 760CCA and 105 A/H for $239

Century Deep Cycle Flooded Battery (N70t) - 100A/H for $199

Century Marine Pro 730 - 730 CCA and 100 A/H for $195

Any experience / recommendations with any of these -- or any other similar batteries for that matter! Thanks!