I really don't see a problem with the stripes ^^ they look much better on OP that they would on me.
OP- I think that if you can get a better saddle for you (perhaps an inch or two larger?) that you two will look much better suited for you. If you can stretch your legs out more, your body will relax and make it a more enjoyable ride for both of you, and you will be much more comfortable! She looks very capable of carrying you, unless you're wanting to jump more than say...a 2'6" hunters course or something. She's quite the cutie!