Unique and cheap don't really go hand in hand. If they are cheap, everyone has them. You want unique with a nice lip, look at some of the HTN wheels.
The reason people run staggered setups with BBS is because they are a 3 piece wheel so its do-able and you can spec it almost any way you want. Not so easy to do with a cheaper alloy wheel which will usually only give you 1 or 2 options.
Another staggered option is Alpina 15x7, 15x6 or 16x7, 16x8. Again, not so cheap (and not particularly unique)