Lavender and roses... glorious combination... :) The scents, combined--utterly enticing. I'm thinking, add jasmine! Lovely entry to the garden, and you don't need a brick wall to make this happen. Cue, for you, T.
Brick wall capping example: I like the look of this wall and especially the capping. I'd like the wall to have some element so that the top wasn't all one straight line. I'm not necessarily in favor of the columns with finials shown here though, so need some more ideas in this regard.