Pick your two favorite lenses

Definitely the 45mm - that's a no-brainer - great little lens.

Probably depends on what you shoot...

The 25mm is a special lens, but for a standard walkaround, I'd prefer something wider.  From reviews I've read the 14mm may not be all that great optically, but if limited to your list, I would probably choose that.  The 20mm might be a better option - very good optically.

Personally, I have 3 primes:  12mm, 25mm, 45mm.   I may decide to add the new 17mm, as that would be a good walkaround length, but the few reviews I've seen so far haven't exactly been glowing.