I'm also hunting for a charplotter and am going to the boat show but was really impressed with Charplotter prices from the US site BoatersWorld.com
I think they are flogging last years models but hey, what the heck when the discount appears to be about 50%
I am not expecting the show to give that sort of discount but haven't quite got the courage to send money to the US for something I haven't seen
David- I think the "discounted" prices are somewhat suspect. eg the cig lighter adapter for a handheld was never originally $52 and a Garmin 126/128 was always around $270-290 orig price. Look at Boatus.com for comparison of orig prices.