Belgard has an Anglia Edger Stone -- for planter edges -- that could be a unifying look for "edging" both the Flagstone/Gravel path and the paved pathway. Choose a color close to your paver color. Example:

http://www.belgard.com/products/finishing_touches/anglia_edger

Since DIY seems to be your choice, consider staining the concrete patio in the similar color tones as the edger stone.

Of course, depending upon your budget, a good paver contractor can always re-design the whole look to be appealing. ;-D

You can mix materials, but it has to be done with care....coordinating colors or shapes or scale or mood/formality. If the pavers were the same color family as the stone, and you used bark or even turf instead of gravel among the stones, you'd have less of an issue. Typically one uses the more formal, expensive materials closest to the house, and lesser or humbler materials towards the edges of the property. The central walk should really have the finest materials, such as large, well cut flagstones....leaving smaller (or more irregular or lesser) materials, such as pavers, for secondary paths. So we have multiple factors going awry here.

As to the porch, you need consider grade as well as color, texture, form, and scale. It seems you cannot build up the porch more than 1-2" at most or you'll interfere with the door, and you must avoid creating an awkward 2" step, especially with a narrow walkway.

If I were you, I'd probably paint or stain the concrete a deep red or similar color, and budget for a wide front walk in flagstone, or perhaps a more affordable and well-designed mix of concrete and flags.

The new walkway needs to widened at least to the inside width of the columns but could be to the outside edge of columns. Change the gravel/flagstone to match new walkway and curve it so it is farther away from porch railing. Stain the concrete floor to match the new pavers

Thanks for the input, all! So the consensus seems to be that staining or painting the concrete patio floor is preferable to refacing. Is this mostly based on budget and constraints with interfering with the door, etc? My main concern was wanting to create a higher quality feel on the porch itself, so I had really hoped to be able to add a nicer material than concrete there.

I completely agree with all of the comments about replacing the front pathway, and the advice about widening that is really helpful too. Would just love some advice on how to make the porch feel more in line with an upgraded walkway as well.

Thanks again!

The ones from the sidewalk look much better. It should be wider, but it still looks good. I'd replace the paver path with those and reuse the pavers in the backyard.

Ive seen tiled porches that look great. If I could match it, I would.

Slate is terrifyingly slippery when wet. I've fallen on my neighbors' slate walk. All my kids have. My neighbors have. They took it out also because it wasn't done well, but they chose a different material for replacement because of the falling.