The M4 would be good providing you get a good one, I've been looking at the reviews for it and some are getting bad drives. Are you looking at newegg.com?
I have the crucial c300 sata 3 64 gb ssd and have no issues with it.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820148357
It's a little slower then the M4 but its still fast. I can be at my desktop in like under 20 seconds once I select windows 7 as my boot OS.
As far as the rebates go, a few people i guess don't get them but most do.