I get a message that says Cabelas.com isn't available right now so I will just give some general advice. I took up motorcycle camping last year and this year after not really camping in many years. On my trip to Canada in September it got down in the 40's. I have a cheapo bag rated for that but decided to take a North Face 0 degree bag. That was a big mistake, I roasted in that thing. So I would say get a bag that is rated for the temps you expect to see. I know you said it could be warm or cold, but just don't over do it.
I can't see the pad you picked out but the one pad I wish I had got was the Exped Synmat 7 or 9 with the handpump. The pump is built into the pad. It is pretty light, packs small and is thick. My Therm-a-rest packs just as small but is only half as thick. Whatever you do, don't get an air mattress as they have no insulation value.