To be honest the best thing you can do where antifreeze / coolant is concerned is simply change it every 2-3 years and this will help to minimize corrosion within the system and keep it at its optimal.
Brand names are generally no different to a lot of the cheaper options, just check the labels and compare the specs
You could buy the "Waterless Coolant" which is supposed to be better for the engine and has a much higher boiling point and life span but it's not really viable for most people unless you plan on keeping the car for the foreseeable future due to the original purchase price and if you get a leak in the system you can't just top it up with water at the road side, it HAS to be the original waterless coolant.......
Personally I'd suggest using normal antifreeze, Blue, Red, etc it won't make much of a difference to your Frontera so long as the old stuff is flushed out properly but I tend to use distilled water rather than water straight from the tap.
Costs a bit more but as it's distilled it has none of the impurities that you get in tap water and normally can be bought off the shelf in 5 litre cans for less than £5. A 50/50 split between the distilled water and the usual 5litres of antifreeze normally then gives you enough premixed coolant for two changes
