Not many mods done, but I like the new look. Gives the car a defentive edge and sportyness. I think most of it can be traced back to the Astra OPC FB, but the stance and choice of rims do help. The overall work that has been done to the car is well done. I also like your choice of fb cause it fits with the general lines of the car, giving the chop that sleak OEM look that is quite hard to get whilst still giving the car a more agressive look. I think you have done well in that department. The shadows on the rims look very nice, however maybe just a tad dark, but placement and such is good.
If we move over to the picture you call "level 4", I like the background you chose. It fits the car, and is in itself exciting. The car sits well in the background and the lighting in seems to work quite well. However, there are some issues, the primary one being that extra reflection you have added to the side. If you look on the original picture you will see that the door is divided by by a line with a really dark color. Below there is a greyish area and above a whiter one. These are reflection lines from the studio in which the car was photographed. The darker grey area is the floor, and the whiter area is the wall, or perhaps ceiling fillied with lights. Pretty sure they have rebrushed it a bit also, cause the refs look more outsideish. However! You have just plastered your new refs over the old ones, which looks strange. What you should have done was to first rebrush the side, removing the old refs. Then added new ones that correspond to the new environment. This is however extremly hard! And you will have to look in the upper forums on this site to find choppers that can do it. So therefore my sugestion to you is to start by using original pictures with cars standing outside, and move them to new bg's with similar lighting and enviroment. And from there move on to more elaborate work.
Overall this is a nice chop and I like it

Keep it up!
Cheers!