I have the Silvercross 3D and I love it as well. We had to be very 'careful' in what we bought as we were moving countries when Stevie was 7 weeks old.
The pram was her initially her bed/cot (with liner in), car seat, a place to sit etc. Now she is 4 months I can take her around the local area in her stroller without car seat but I can also clip the seat to the pram when we use a taxi to go into the city (we don't have a car and rely on taxis so this is a must for us). At night when we go out to dinner or a friends house we recline the stroller to flat (there are 4 postions) with a comfy blanket and she will quite happily sleep in it for hours at a time.
It is a little bulky but it is sturdy and has survived numerous plane trips, taxis, buses and a boat/ferry. I think it has been outstanding value for money for us.
Tip - buy the parasol when you get the pram as other parasols don't fit!
Good luck.