Yes I use Medela single pump and it's very convenient and easy to use..I carry it everyday with me now. And I brought a second hand Avent manual pump recently, I found it OK, but a lot of parts and quite big, and most importantly, your hands will be so tired after the pumping.. So I suggest u to use the electric one, best for medela
Avent IQ electronic pump. It's excellent! It can follow/learn your speed and pressure that it's very comfortable! I have pumped 4oz in 5 minutes only (when my breast is full in the morning).
Suggest you to buy it about the 3rd week after BB born. At that time, we should know whether you can BF or not.
I brought it from "BeBe Dream" at $950(original: $1000, 5% discount for some BB Clubs' member). You can also check with "Baby Outlet". They used to sell it at $899.