Would you change a nipper for a mountain bugggy???

[tooloudhere]

I am considering selling my double 360 nipper and getting a mountain buggy double for my new arrival so I can have a carrycot.
This is my second small age gap and I found the nipper great but really missed having baby face me to start off with. I know the mountain buggy is heavier but a little narrower. The carrycot doesn't look huge do you think you would get 6 months use or I am being too hopeful. I believe the mountain buggy can take a buggyboard which may be useful.

Am I being crazy to consider selling something I like and get on with just for one feature?