No C-130 love?
Here's some of the variations on the C-130 I've made with an eye towards making it a spaceplane. Ideally, it uses the KAX 3-blade props to get up to about 10K meters, then activates the armpit-mounted dual-mode rocket engines. I work on C-130's in real life, and wanted to see my plane in space.
http://imgur.com/a/lKY3U