Your best to seek advice from a local as to the size kite that would suit you but as for make/model you are spoilt for choice these days.
You don't want a super-high performance kite. You want sumpin that behaves well (stable in the air), relaunches really well, has a good safety system (all kites these days are far safer than your old set-up so no dramas but some safety systems are a
little better than others) and that will get you going in the right direction.
Some kites that fit this that you are likely to find a choice of are:
Best Waroo
North Rebel
eclipse Nano
Cabrinha Crossbow (or Switchblade)
Slingshot Rev
Anybody else got any suggestions?
The above kites are not listed in any order BTW - just all good kites to get going on. Don't agonise too much about which one will suit you, it's takes a season or two before you will be fussy, just find the best condition example at the best price you can.
Also do a search on the kiteboarding - general and newbies forums for similar advice.
Would be a great idea to get a lesson too. 
Take whatever kite you buy along to the lesson and ask the instructor to point out the best/safest way to use it.
Best of luck.