If you have the $ i say go for it.. but its a good amount of $ to get the full REO setup - one of the reasons I still don't have one.. but Rob is hands down one of the best mod builders in the community.
I've been using one for 4 years. It's a turn-key operation. I'm a logger and I put my Grand through conditions that most folks never will--just keeps plugging away. I pissed away a lot of money shopping shopping for the right mod. I quit shopping after I got my first mod from Rob. The quality and customer service is unmatched IMO. You won't regret going this route--believe me.
I would recommend the LP version, then you can use any rda you want, not just the one's he's selling, provided of course you have the skills to convert them to bottom feeders