Flatpackireland were charging €150 or 30% of your shopping bill, whichever is higher, for delivery so on €4500 worth of IKEA goods they would charge €1500 - pure rip-off and good riddens to them I say.
I flew over to IKEA in glasgow and bought 5 grands worth of gear and got it delivered by the courier company in IKEA. You collect all the stuff from the warehouse, pay for it, come through the checkout and go to the delivery guys (DFDS I think is the company) and they count all your boxes and sticker each one. Its £75 per trolley (minimum order is 2 trollies costing £150) and you can get plenty onto a trolley and use a bit of smooth talking to get away with it if they give you hassle that it is overpacked. The trollies are flatpack trollies and I got 2 mattresses, 2 beds, kitchen table, bookshelf and a few more bits and bobs onto one trolley. I really had 4 trollies but managed to get them to take for only 3 as I was rushing to catch my flight and told them I didnt have time to move it all onto 3 trollies (not that it would have fitted).
I also bought 4 sofas (2 for sister) and as these were being made to order (as many of the sofas are) and delivered later there was a separate delivery charge but I think that £75 covered all four sofas.
So on my 5 grand shopping I paid around €350-400 in total for delivery which is very reasonable IMO. They delivered it one week later and the lads carried every item into our dining room at the back of the house.
Be warned though - the place is deceptively big and takes some amount of time to get through. I advise using a clipboard to jot down the reference codes as you go round and then before you go into the ware house break these down by aisles, actually go into the warehouse first to get an idea of the layout of the aisles - this will save a lot of time that would be wasted by visiting each aisle more than once.
Note that some stuff may be out of stock so ring or use their website to check if you have a particular product in mind. Before hitting the ware house nab a staff member (who were all brilliant) and get them to check availability of all your gear, also use them to order all your 'contact staff member' stuff in one go - this is stuff in a non-public area of the warehouse that staff have to pick for you once the order comes through - getting it all done in one batch is handier and reduces chances of them messing it up. Expect a fairly long delay at that collection point and you have to pay for the goods at the checkout first so anticipate this delay.
You can buy strong cardboard boxes in the Home Org section and use these for transporting all the bits and bobs (kitchen bathroom and lighting stuff/accessories are exceptionally good deals).