I do not think that it matters. I got Shiny Things less than a week after I got Beauty. Both rabbits are doing great. They are not bonded yet since 1 got spayed just under 2 weeks ago and the other might be getting spayed on Friday. When I got them I would let them run around together supervised of course. Both rabbits have bonded to me in different ways. Shiny Things is the boss, is cage aggressive, and is as sweet to me outside the cage as posible. She lets me give her her medicine withought a struggle 2x a day. Beauty is more shy but still comes up for atttention from time to time.
I think that if you are ready for a new bunny then go for it. Just be prepaired to house them seporately incase things do not work out for whatever reason.