Hi Maggie,
Regarding jogging strollers, I had the same idea for when my baby was a newborn, but was disppointed to discover that they are not recommended to be used for young babies - some advice says from 3 months up, some from 4 months up - because of the head jolting issue when you pick up speed. Then when my daughter was old enough, I was trying to get her into a routine and found taking her out running was disruptive: either the motion would send her to sleep at a time I didn't want her to sleep, or if we went out at naptime she would wake up when we stopped, whereas she would have had a longer sleep if she had stayed at home. I did manage to go running but mostly when someone else was able to look after my baby. Evenings are good if you plan to breastfeed because your breasts will be lightest then!
So just give some thought to these practical issues before you shell out a fortune. Also, make sure you don't rush back into running before you have rebuilt your pelvic floor muscles, otherwise you might put undue stress on them before they have had time to recover from pregnancy & birth!
Anyway, I have a Mothercare Urban Detour and find it fits most of your criteria but it is not light. I don't think jogging strollers are designed to be light; they need to be somewhat heavy to provide stability at speed. Ours is not a true jogging stroller but a hybrid which is much cheaper (still HK$2000+) than fancier models. Pure jogging strollers have handbrake, wrist strap, and are elongated in shape so that baby's weight is over the rear wheels - but can be ludicrously expensive as well as impractical to transport because they are very long and won't fold into a compact shape for car boots unless you remove wheels.
I'm actually looking to sell the Urban Detour if you decide on that kind of compromise. It is in good condition and you can see the specs at
www.mothercare.com.hk (it's the only 3-wheeler listed) but ours has pale blue & black colouring.