Hehehe anything you wanted the first time round but couldn't afford LOL.

Naw only joking, it works the other way round, you realise with your first how little you actually do "need". But on the other hand you've got a better idea of what things are really useful.

Things I lashed out on with DD2:
a boori matilda cradle (much bigger than a basinette, kept her in it until she was big enough to go into a different room)
a shaped denton's preggy pillow & a breastfeeding pillow (made do with a sad & saggy u-shaped pillow first time)
a really good sling (had a cheap n nasty first time)
a new monitor (cos the first one died after a couple of years constant use)
an inflatable ducky bath (sits inside your regular bath, really handy for bathing little ones without filling the whole bath)
playpen (didn't need it with DD1 but it was brilliant with DD2)