I bought a Trainer kite 2 months ago and Love it, its a 2.5m kite, i have a mountain board and i built a kite buggy, I really enjoy kite bugging.

Ive been looking at cheap second hand kites as im still only getting into the sport.

Choose of 3 kites but don't know what to go for

Blade iii(3) 3m kite 100e
Cyclone -spirt of air 3m kite 100e
Radsail savage 5.5m kite 150e

I'd like a traction kite as getting lifted in the air still scares me a bit.

What do people make of the 3 kites. Reviews? Or which should I go for ?

If those are the only three you are looking at it has to be the 5.5 as the others are too close to your 2.5 . I would never get a 3m blade III. That kite is going to be crazy fast and likely pretty aggressive given the nature of the III series.

Can't say that I'd be tempted for any of the ones you listed. I think maybe wait and pick up a 4m Hornet/Beamer/Flow/Rage/Viper/Buster/Zebra Z1. There's sure to be one come up for sale soon. Nasa Star 2 or NPW wing would also make a great traction engine for your buggy and be easy to fly, hard to bust with no lift.

Agreed with all the above. That blade can be evil scary and apparently the savage was designed for maximum air time. Follow John's advice and go with a Hornet/Beamer/Flow/Rage/Viper/Buster/Zebra Z1. A 100-150 Beamer 3 would get way more use than a blade 3 (for instance)

I also came across a kite called "x-trac" 4.5m kite but from google searches it didn't get great reviews, has anyone else tried them?

I'm going to hold off the 3m and go for a 4 or 4.5 m kite. I dont as to spend huge money as I'm still kind of new but I really a loving this sport and I want a fairly decent kite that isn't super aggressive to fly, but ideal for kite bugging. I am also on the look out for a second kite as my brother is mad for this sport too and sharing is over rated lol !!

check this tutorial out : http://www.coastalwindsports.com/BetterBuggyBasics.html#5

You might dig a smaller, newer blade. The blade iii was notoriously evil. Where are you? If you're in Europe, did you see these?
The blade IV is pretty lofty, but it's a classic for a reason.
http://forum.kitecrowd.com/sale/flexifoil-blade-iv-4-9-last-...

If you can get some buddies to chip in:
http://forum.kitecrowd.com/sale/flexifoil-blurrs-full-set-li...

This would be great and scales well with increasing skill:
http://www.ebay.co.uk/itm/331027383747?ssPageName=STRK:MESEL...