I have just bought a new one myself after much mucking about.
The first one was a Makita BO6040, I found it far to big and it vibratied a lot,on top of that it did not have a dust bag or even a side handle so I took it back. I am a great fan of Makita tools so I was a bit dissapointed.
The one I have ended up with is a Metabo SXE450 Turbo Tec, it is a great piece of kit with a good dust filter system,2 orbit diameters and a turbo switch for when you need a quick boost.
My one was with 100 free discs but there is one with a case and a few discs.
I got mine from Aldermaston tools and as ever they were very helpful, the last good thing was the 3 year warrenty and at nearly £100 difference I am well pleased.
Merlin.