How much did you pay for the TRF511 Dave? I honestly can't remember how much I paid for mine, but when you add gold shocks, proper ball studs (the silver ones are CRAP), body, wheels, etc etc - without even adding the alloy hubs that the team drivers use you're probably looking a similar price to the DEX410? Or at least not far off. Fusion sell the 511 for 460 on it's own - add the bits you need/want and you're looking at 500-550 for the TRF511.
Shop around and you can get it cheaper - but it still doesn't come with the bits you need / want (little things, like a bodyshell, haha)