The tank is 6x2x2, 150 Imperial gallons. It is filtered by two sump tanks (each 24x14x12 - 14 UK gallons) and will probably soon be converted into a wet/dry or an algae turf scrubber (ats means far less water changes).
All in all the tank probably cost around £400 to set up. the tank was about £180, the wood to make the stand and hood was around another hundred with the rest going on the pipework and sump tanks.
Shows you can have a good tank for very little, providing you are prepared to do a bit of DIY. This tank only costs about an extra £100 to my first tank which was only 37 gallons.