It depends what you want out of your Reptile.
I would say Water Dragon, Uromastyx, Blue Tongue Skink or a type of Monitor.
Scott - Christchurch, New Zealand
Previous reptile experience:
1.1.0 Inland Bearded Dragon - Bella and Jack(Pogona vitticeps)
1.0.0 Bell's Dabb Lizard - Ryu (Uromastyx Acanthinura)
0.1.0 Jungle Carpet Python - Yuna(Morelia spilota cheynei)
Doncaster Dome - June 28th 2009, September 6th 2009