Option 2- vistaprint on one of their 50% off sales.
We used them for both and got them for cheap, also skip on all the extras like the boxes or the trifolds or the belly bands. Ours is literally 1 envelope with 3 papers in it. Also, you can do RSVP online to save on postage.
We skipped the STD's I don't see the need to spend the extra money on them when we could use it on the Reception to make it more comfortable for everyone even it if its only 20-40$ It could be used else where.
We used Vistaprint and they look awesome! Ours were $30 (plus tax and shipping) for 40. They then gave us a $10 credit to use towards invitations which I just bought today, so those came out to $20.
I made my own and printed them on card stock using the program smile box. They turned out really cute then we just put them in envelopes and sent them. I'm making my invitations and thank you cards with the program too. It was about 45 dollars for a year subscription. You can even send them through email if you would rather.