So get what you can afford
As CC it seems to us very *@]+ when Y pax try to be doggy to get upgraded! You can believe what people are able to make up once on board!!! in 16 years flying I have heard them all!!!
.... and it doesn't work with me I am afraid
... Last I have to deal with (full A/C in Y) was a Y pax seating on lx part, he said that he couldn't fly on lx part, but only on rx, therefore he wanted to be upgraded to be on rx part
... And by the way ... I'd love to drive a Ferrari, but I am afraid can only afford a VW