I would also defo recommended GSport, fitted my Kakimoto lately for me and I couldn't fault there services at all.
A few friends use them regulary aswell.
I did think this myself when i read it.
You get what you pay for but im sorry that is insanly cheap, its bound to cost more than that in materials alone.
Did it come with the original oem plate holder for the front?
If not you could always go for a smaller sticker plate for the front so it sits perfectly smooth on the bumper.
Think there is a seller on here who makes them.
It really depends. Everywhere will quote you different probably.
I paid £500 for mine to be done but they are possibly better than factory finish cause I'm so so fussy.
You can get done for a lot cheaper tho. Prob around £300 is say.
Buy once buy right imo. you may buy these but if it doesnt work perfectly for you... you will end up buying again so could cost you more in the long run. if you cant afford to buy new OEM ones in my opinion save and wait and buy genuine.
Think they are just over £300 from Hendy performance atm...
2 Star Decal...
http://www.ebay.co.uk/itm/JDM-OEM-HONDA-EMISSION-2-STAR-DECAL-FOUND-ON-01-07-INTEGRA-DC5-RSX-/201151799446?pt=Motors_Car_Truck_Parts_Accessories&hash=item2ed594e096
im going for 25mm all round, i have changed from my rotas that sat rather good to my oem wheels and they really look lost i feel. 25mm bring it to the exact same as my rotas so that what i have based my choice on just.