I have a 857D with 20 watts and i have been looking for a good hi power PA. I Can't find any good ones at 70cm, only a few expensive at 100 watts max. On 2 meter however there are plenty, i am a bit tempted to go back and run 2m only.
What do you consider Expensive?
I am a big fan of TE amps, they have performed flawlessly for me over the years, I use with 300+ watts on 2, 220 and 440.
Stay away from Mirage/MFJ for my personal history they are crap.