I have a 440. I love the BSR, even though I've now got a longarm. (Longarms are a wee bit of overkill for things like mugrugs, so I've got the flexibility for both.) It was a little tough, but I did manage to do a 108x108" lonestar wedding quilt with the 440 & BSR with few problems - just get the large extension table (the one that's 24x24".)
Keep in mind that they just ended the 440 production run - they've switched over to the 550, now, which is a very nice machine indeed. So if you're willing to go for something a little older, deals are ready to be had on used 440s.