I've purchased from ASOS 3 times in 3 months. All arrived a day or 2 later. Used my office address as a delivery add. No issues at all. I recently purchased some other clothes for my gf. Im expecting it to arrive next week.

As for taxes, like what the other bro's said, keep it to below 450/500 & since its free delivery worldwide, you wouldnt have to worry abt shipping. So, divide them in about 2 or 3 packages. My last haul, came to abt 1.5k. i divided them into 4 transactions. Each around 80GBP.