I'd prefer a Zaino shine like HRP too but you also have excellent choices. I'd start with the
menzerna twins as your polish, then use your klasse twins, then decide on poorboys natty's and save some money or go for the 50 something dollar of
pinnacle Souverän as a topper (don't get the cheaper pinnacle topper for dark colors), this would be my choice on your list.
You can apply menzerna fpII by hand but not the IP, it would be a waste. One possible substitution from my suggestion would be to change the SG for another sealant, you mentioned you want to try poorboys and they have good stuff too. p21s paint cleanser and AIO are must haves if you are trying to achieve a good detail w/o using a machine. You could mess with both of those on a clayed car with no risks of abrasives and often find yourself hiding swirls very well.