based on the lack of responses, i think the opinion is pretty clear, no?
admittedly, i've never heard any aiwa system (other than their bookshelf units - which i've always kinda liked) but i am somewhat doubtful that aiwa is ready for prime-time ht.
what's your budget? i'd check out the kenwood htb's first - they're pretty well regarded. check out this link for further info: Kenwood HTB Listing