First of all, there is nothing wrong with the Penguin edition, but I have found out that for a few more dollars one can order the Loeb edition from Amazon.com Here. This is the Loeb edition of the work, but there are many other translations on the texts.

Also, there are E-books now for a bare minimum, like $2.99 Here.

And also, there are free texts online Here

I suppose by me showing all this I am asking for a pounding by AER.*L*