Thanks everyone for your thoughts on the reflector question. I'll have a good look around at the boat show, but the usual pay more get more yardstick still holds true.
Whilst on the radar subject if you had up to £1000, would you buy a good chartplotter or basic radar system?? I know they do different jobs but I need to ugrade the boats nav systems and I am not sure what to buy.
FYI I have a Garmin fixed gps (basic one), a handheld garmin gps, icom dsc and handheld silva vhf, compass, garmin fishfinder.