The TX650M is a good unit - especially for the price.
If either the HCG650 or Focus+Gold 650W is cheaper (or within a couple of $), it's probably not worth it though.
They look to be the same price (in the US at least) before rebates......
If you're ok with going through the rebate process, the $20 you'd save is probably "worth it".... but if you just want to spend X and not deal with the rebate process, I'd still opt for the Focus+