You cant "slip in an AVR 600 unnoticed" as it weighs a very lot! I can only just lift mine.
You would need the help of SWMBO to carry it in.
If its any help to you my wife couldnt believe how much my 600 cost and kept saying "why do you need to spend more money"
Then she finally listened to it and had to admit it was stunning.Result.
Glad I bought mine at £2750 if a 500 is to cost £2500...bargain. Also dont forget VAT is going up soon so that could be the reason to buy now rather than later (female logic?)
ARCAM AVR 600, DALI IKON 5.1, OPPO BDP83 modded, PS 3 80GB Tevion 47 inch TV but looking.