Excellent job! I also try to make things look as "seamless" as possible, and I like the "blurring the lettering" trick too. Though I think I forgot to do that on the most recent My Jet Dream Romance
With more modern material you can "get away with" a slicker look, but there's a lot of dissonance if you have old crappily-printed comics pages combined with slick modern lettering.
I use Corel's Paint Shop Pro myself. Significantly cheaper than Photoshop, but seems to do everything it does (or at least for our purposes.) Experimented with GIMP a little, but found it a bit too confusing and hard to work with.
But full-page/full-story treatments aren't all that hard to do, and I wish more people would give it a try. Finding the right source material for the kind of story you want to tell can be difficult, but I can help people with that.