which shower type should I go for (been used to an electric cold fed shower for the last 10 years, so my opinion is biased)
Anything other than an electric one.
Electric showers are the most feeble, underpowered and useless type of shower you can buy. Generally only fitted where there is absolutely no other option available, or a cheap-o-matic installation is required.
Showers are:
electric - cold in, heats using expensive electricity. Ridiculously poor flow, feeble in the summer, next to useless in the winter.
mixer from combination boiler - heated using less expensive gas or oil, far more powerful (typical combi 30kW, best electric shower 10.5kW). Combination boiler can only supply 1 at a time. Only realistic for small properties with one bathroom.
mixer from mains pressure hot water cylinder - decent flow & pressure, multiple outlets can be supplied simultaneously (depending on incoming water supply). Cylinder heated by gas, oil, electricity or other fuels. Requires decent incoming mains water supply.
mixer from open vent hot water cylinder - low pressure, can supply multiple outlets, may be difficult/impossible depending on location of cold storage tanks relative to bathroom. Cylinder heated by gas, oil, electricity or other fuels. Can be used where incoming mains water is low pressure/poor flow/both.
mixer from open vent hot water cylinder with pump - as previous but with higher pressure, determined by pump. Location of cold storage not an issue. Pumps are noisy and cheap plastic ones do not last very long. Good quality brass ones are expensive.
Other variations are available such as showers with a pump inside, shower mixing units which are remote from the outlet and have fancy electronic controls, combination boilers with a small amount of storage inside, etc.