Lucie - we are looking at 7-seaters too, probably won't get one until nearer April but at the mo we can't all go out together as a family of 5 
Frakk - didn't realise yours was transverse too. Not sure if scans are hazardous really, just the faff of going to hosp, being on their 'radar' as a problem, etc. i don't want.
Re stuff (from previous DC):
cot - M&P Sherwood, v sturdy would recommend, though M&P sizes are odd for sheets so i got sheets from them too, think i got 4, never ran out and they were a nice soft material. Also got a cot-top changer, useful for first few months, then a pain to store but still have it.
buggy - well, started with a M&P 3-in-1 we were given, still have it, carry cot v useful as a 'bed' downstairs, also used it as a crib as neither boy slept well in the crib we had & also good as the seat faces you when pushing. Never used the car seat that came with it though.
Then moved onto a M&P Aria - hated it.
Then a Phil & Teds - loved it but big & heavy.
Then a Maclaren Triumph - pretty much love it but not good for newborn i don't think.
crib - we bought the cardboard crib from M'care, and i lvoe it but the feet are curved, to rock easily, and neither boy liked the rocking motion when they moved asleep, and it woke them up, so we put towels underneath to keep it steady then it was ok. Folds flat in the loft which is good. don't think they do it anymore.
what else?
Clothes - lots of plain-ish babygros, some bargainous ones from Argos if they still do them? Got sucked into lots of M'care shopping 1st time round, less keen now, lots of other places are cheaper for the basics, Primark/George/etc.
For 'outfits' - not bothered about young baby anymore tbh, babygros are much more practical. otherwise, John Lewis/Boden/Next are good for boys.
Activity mat - can't remember name, want to say little einsteins, but that's not right, will have to look it up, both boys loved it anyway, so still have it.
cot musical mobile thing - again einstein something, both boys liked it until they got big enough to yank at it.
bouncy chair - got a plan fluffy M'care one it's ok, no great shakes. Also got a musical kick 'n play one that they both loved when older.
think that's most things! sorry a bit long :)