Hey Nick. The best price I have seen on these is at (I hope I can say this) Envirospec,
Envirospec North 877-351-1238
Get the TRXB-HW (Hot water) It says up to 130 degrees, but we regularly run 160 through them and have had very few problems. You run off the restaurants hot water, so in most occasions, you can get rid of the hot box. Let me make it very clear that this machine is not the end all be all of pressure washers for hod cleaners. There are going to be occasions where you want more power, so dont sell your gear to buy this one.
The other thing, I would ask is if they can swap out the plastic water hose inlet for the aluminum. I had to buy these separate and replace them myself, and let me tell you it is a PITA!
You are probably going to want an extra length or 2 of 50' hose, the 1/4" will work fine. This should give you 125' of hose which should be fine for most set ups.
Good luck and let me know how it works out.