I ordered from a combination of places. I used basic invite for the main invite and additional detail cards. Basic invite has the same 180+ colors for every invite suite. Therefore, you can mix and match! This was huge for me, because I didn’t want the same design on every card. I also purchased the matte black invitation pocket from them. They did not have great envelope color options. I used LCI paper for the envelopes, envelope liners and invitation backing (my main invite is clear vinyl) and I wanted to have a cool pattern to make it pop, same pattern was used for the liners. I purchased the image off of shutter stock! Super easy to upload everything and they send you a proof. Lastly, I ordered my wax seals off of Etsy. I suggest ordering proofs of everything and play around with what works best!
Got my save and change the date postcards from Minted and LOVED them (great quality, super fast). Also planning on using them for our invites. We don't care about the whole ~invitation suite~ thing, so we're doing the all-in-one (invite with a perforated RSVP card, folds into an envelope), which I think starts at $1.50 each!
I ordered from Truly Engaging magnetstreet.com. I absolutely recommend them! I was very impressed how mine turned out. Also they always have a code for 75% off and free shipping. I only paid 140$ for 180 invitations. You can customize invitation colors if needed