The H&R only offers a stainless receiver in the .45-70 GOVT. you can then get additional stainless barrels which I have done, but they do not offer a .25-06 in stainless. they offer a .223, 30-06 and a .270. I don't think they are going any more SS barrels any more based on a conversation I had with a smith at their factory. to achieve a .25-06, you would have to buy a .223 stainless barrel, drill, ream and rifle, then chamber. this is possible but it costs about five hundred dollars. I looked into it for chambering it in a 6.5mm-06. however, you are still shooting a H&R which is not bad at 300 yards but I haven't shot mine past that. like Mudrunner said, the Thompson center is a better rifle and you don't have to ship your rifle back to the factory to have another barrel fitted, you can buy them off the shelf.
The H&R does make a blued .25-06 with laminate stock in the Ultra Hunter Rifle but that is the only model that comes factory .25-06. you can look at this page to see their barrel accessory program for costs.
H&R 1871 - Barrel Accessory Program
depending on what you want to do, if SS is a must, then you may as well get a Thompson because I am not sure it will be cheaper to get an H&R. if not, and long range isn't that critical, you could go for the ultra hunter rifle.
one more quick note. the trigger pull from factory is aobut 8#. you have to do some serious modification to get it to 3#. filing and brazing is involved. so consider that too.