My car has had starting problems in the past which were all being caused by the battery being too small. When we bought the car, it was fitted with a 9 plate battery, which IMO, is too small.
I now have a Super Charge 580CCA battery (maintenence free) and it has been going strong for about 2 years, even in the Ghia with full electrics, and my audio system. I run the standard alternator (Always maintained in A1 condition) and I have no charging or starting problems.
Worth every cent IMO...
CAUTION: Slippery When BOOSTING!