Buggies can be very confusing! But I agree, don't go for one of the massive ones unless you are planning on doing lots of off-roading.... I had a Maclaren Techno which has been great (although probably not ideal for the first few months as it doesn't go completely flat) it is neat, really easily manoeverable and foldable (doesn't hold that much shopping though).

Another thing to bear in mind is whether if you are planning to take your buggy on the local buses. It is often difficult to get a buggy space on the buses, and some of the bus drivers can be very jobsworthy and only allow one buggy on at a time. In theory if they are all small buggies you can fit three on a bus, but if someone has got one of the big 'chariot'-type buggies it can take up all the space. I've often waited anxiously at the bus stop to see if I'd be able to get on the bus with my buggy, and if the bus is full I'd have the choice of waiting for the next bus, or folding up the buggy (which is impossible with one hand, so in the past I've had to resort to looking for a kindly stranger to hold my baby, whilst I've wrestled with folding up the buggy, and all the bags, whilst the thoughtful bus driver usually starts driving off....). So easy foldability is definitely a plus-point.