Tree removal?

One of the trees in my front yard split while I was out yesterday — presumably in the big storm in the evening.  Half of it is lying across my roof (and, from the inside, doesn't appear to have caused any significant damage) and will definitely have to be removed, and I'm pretty sure that the rest of the tree will have to go too.  Can any of my local friends give recommendations or warnings about tree-removal services?

Thanks in advance...

(ETA: My neighborhood was without electric power from 7:30 yesterday evening to just before 7:00 this morning.  I got home in utter darkness and didn't realize that the tree was down until just before I was going to go to bed, when I noticed that there were a lot more leaves and branches outside my office window than there should be.  I'd noticed a faint musty old-wood odour, but assumed that it was just because the furnace fan was off and the house was unusually hot and humid... it was probably because the tree thumped the roof, and stirred up dust in the attic space.)
 

Tree 2

I went with the tree people recommended by my mother (in part since the other company I left a message with didn't call me back).  The fallen section of the tree has been taken down, and there doesn't appear to be any damage to my roof.  I'll be more sure of that once all the sawdust has blown or washed away from the shingles and I'm able to go up and get a better look.

At this point, all of the material is spread out on my lawn.  They're supposed to come back and remove the branches and leaves, and take down the rest of the tree, in a few days — there's more urgent work for them to take care of in the next few days.  They're supposed to leave all the wood and thicker branches for me, cut into 16" lengths for firewood.

So far, so good.  I'll post more information and my recommendations about the company after they finish the job.