I have 3 Greyhounds & i would recommend them as the best dogs ever.
They are really is to keep, a good sofa/bed is a must for them as they love nothing more than comfort.
Here's pics of my 3.
Scooby who only has 3 legs but that doesn't stop him from running around:
Perrie really interested to see you have a three legged long nose, I've also got one except he's missing a front leg, he still manages to hoon around at top speed though but he can't cock his leg as he lands on his nose, but he's worked that out now. Does your lad suffer from arthritis at all, my boy is only 2 so OK at the moment, but I guess at some point he's going to get it.
OP another option is to get a greyhound or lurcher from Evesham Greyhound and Lurcher rescue (www.lurcher.org.uk) all their dogs are kept in foster homes so they are house trained and fully vetted. I have two from there and can highly recommend them.