Sorry man, been slamed trying to get clients taken care of before the holiday.
If I had a hundred bucks to spend this is what I'd do.
Assuming you already have the needed pads for the PC...
Wash:
I love Optimums No Rinsh Wash and Shine. If you're interested in a no rinse product I'd pick some of that up. They're regular wash is nice too. ~$12
Drying: Very important to have good towels. If your washing and drying is high quality technique and products, the rest is details

. You can really save some money going to walmart and picking up some of the plush blue microtex towels. They are actually good quality. The rest are crap though lol. Make sure to get a 70/30 blend towel. ~$as much as you want to spend.
Got clay? pick up some automagic clay at the auto store. Don't need to waste the money on an expensive bar that will do the same job. ~$11
Polish: As NC mentioned, Menzerna is great stuff, but it really needs to be used with a rotary for best results. I'd pick up some Optimum polishes. They are cheaper and less dusty. The Polish is probably all you will ever need. You can vary the pads to get desired results. Works at a nice finishing polish and does well with heavier issues with the right pad. Doubtful you will ever need anything stronger on your personal vehicle, unless you make a mistake

. The polyseal is a nice AIO choice. A good AIO is nice to have around. Klasse is a really good choice as is clearkote's vanilla moose. The XMT stuff is nice. I actully have some if you're interested. ~$30 for a polish and AIO.
Wax/Sealant: You can really go over board here...at least I could lol. I love carnaubas so they will always be on hand. There are some nice choices that will help you stay in budget. Got a Harley Davidson store near by? Pick up some S100 carnauba wax. Same as P21S but cheaper for the bike guys. Poorboy's Natty's blue paste wax is really nice. For synthetics I'd pick up some Optimum opti-seal. You just can't go wrong with this stuff. ~$15-30
While at the Harley store pick up some S100 (same as P21s) gel wheel cleaner and total cycle wash. Two awesome products. ~$25. Alot more if the p21s brand.
Thats close to your $100 mark. The towels is what can really add up. But if I were on your budget amount those are the things I would pick up.