The interiors far more classier in the 2006-2007 models. Buttons are in the correct places etc lol. Proper drink holders.
Any zed with reasonably low mileage should be fine. The best engine is the hr 313ps engine. It has dual intakes and is very powerful.
There's is three models
1st pre 2006, more torque standard, not so great interior, single xenon headlights (normal high beam)
2nd 2006-2007 revup 300ps model. More hp, better interior, bi-xenon headlights 20quid a month more on tax.
3rd. 2007- 2009 313ps HR. Much better engine, dual intakes, bonnet bulge and interior/exterior same as 2006 model.
There is also a gt4 edition which was around 2005. It has the revup engine but normal body interior for age(unless it is auto which has Pre-revup engine.)