I would also praise the Railmaster 39mm version. I have the same one from Ruby and it is very good indeed. The AR on the crystal is really great -it's easy to forget there is a crystal at all. The lume is good, but as Tom said, not as good as the gen (or my Seiko, which is probably even better); alas gen dials in this size are very hard to find. The 2824 movement is good; but I am planning on putting a nice 2892 movement from torby in instead. The hands are good - hard to fault even under a 10x loupe.
As everyone has said,this is one of the classic designs and this a really nic rep.
Whatever you choose, good luck and enjoy!