From what i've seen amongst the forum if your after anything around the £4-500 mark and want new coilovers then go AP..
If you have slightly more of a budget then go Blistien B14..
Or spend more time looking (umming and arghring) and looking for a second hand pair of B14's then pay to have them rebuilt etc? and expect to pay inbetween £5-750.
My personal choice would be to stick with a set budget and go with whatever the best choice would be in your budget which in your case would be AP's In my opinion if your wanting new coilovers. Thats what i'm going to be buying when i get round to lowering mine
good price / comfort is still there / and reliable for the cost.
Apparently they down't go as low as some people may like but should easy go 40-45mm which for me would be spot on..
Also depends if you want to go silly low for the show queens (55mm+). Or... Be low and drivable still (30-50?mm).