Depends how much you want to spend.
Get an IKEA one if its just a half decent frame which is in offensive and contemporary. Something more bespoke obviously needs to be bespoke. The best thing about bespoke is not just you get the frame you want, you also can adjust stuff like:
1 - mount and its size
2 - glass used (there are different ones, from plastic to some glass which has a coating that makes is less reflective thus looks like it isn't there)
3 - completely sealed
If you are spending £50+, go local, I have had frames shattered in transit. I got it and didn't even open it because it sounded of a box of broken glass and sent it back.