I'm not sure I understand the reason for the round raised bed. The side curved bed flows nicely into the bed in front of the porch, and the raised bed seems unnecessary. I think it actually breaks up the flow of the bed. The bed in front of the porch needs to be deeper, or you won't be able to fit much of anything in it. What did you have in mind for planting there? If all you wanted was a low groundcover shrub planting or a few perennials, you're probably OK, but there's not enough space there for much else. Read some of the other recent threads here and you'll see that it's a common mistake to make beds too narrow. There have been a few discussions about the extruded concrete edging on this forum in the past. I feel that it looks too commercial to use in a residential landscape. It does address a need for keeping the grass out of the planting beds, but it isn't very attractive. It also means you will have a hard time making any changes or additions to the plantings in the future. Depending on whether you're a hobby gardener or not, you can either plant the side of the house with groundcover and run a stepping stone path through it, or make a shade garden. Did the trench for the water line go down the side of the house? If so, you may lose those oaks if the roots were sliced off by the trencher.

Why are you making more work for yourself? Why do you need a terrace in the front of the house? Build a retaining wall on the end and plant with potentilla to give some color to a dark area then make a curved bed starting at the steps and going down the drive with low growing spreading junipers, plant bulbs in the fall and leave the spruce alone. Sometimes simplicity is the best answer to complexity.

How many feet is it from the house to the front flower bed? How many feet from the sidewalk that leads from the house to the neighbors property line to the left? I'm not sure how you'd get the shading to the porch you want without blocking the view of the house from the street. How does the sun travel over your house? What side of the house does the sun rise and set? Do you want shading to the 2nd floor windows eventually? Are their any underground utilities on the left side of the front yard? I'm asking a lot of questions, aren't I! I do like the three trees you chose, but don't have any of them, so I can't help you with their growing habits. I think a non-fruiting crab would be great too. I guess I'm asking how large a height and spread would you like and what dimensions would be too big? Is the dogwood at the back of the house on the left side?

What kind of soil do you have? Is it a sunny area or a shady area? Zone 8, right? Omar