I think, and I may be wrong that the condensing part isn't connected to having a combi or not.
Condensing was the new 'thing' which made boilers more efficient and all are now condensing. Whether you go for a combi or not, it's till condensing.
Combi is convenient because you only heat the water you need, and you can get rid of your tank (useful in my case as I'm having a loft conversion). Plus you have an endless supply of hot water.
But, if two people want a shower at the same time, a combi won't be as good as it may not be able to heat enough water.
Please correct me if I'm wrong... which I probably am!!
Black 330d E90 LCI M Sport Saloon Auto. Privacy Glass, Cream Leather, 6FL, I-Drive/Nav/Bluetooth, Alpine hifi upgrade.