tooo much for new tires???

alright guys i bought my truck and it had a set of goodyear wrangler
RT/S's. had some tread wear then, it snowed almost 2 inches last night, maybe did snow 2 inches, anyway the road was snowy and i took it slow and almost totaled it out twice on my way home from work last night, so i went today and put 2 new rear tries on it, cause i was having problems getting pulled out on slick pavement, the tires were $119 a peice, for new goodyear wrangler rt/s's, is that too much for p265-75-r15's?

would this hurt, i was thinking of putting the rts/s on the back, and putting a set of ats's up front will that hurt anything? heres some pics below.
edit:

here are the front tires i want, they are aggressive terrain tires for snow mud ect http://files.automotiveforums.com/gallery/watermark.php?file=/500/184555wrangler_ats.jpg

here are the rear ones which i already have on it,

http://files.automotiveforums.com/gallery/watermark.php?file=/500/184555wrangler_rts.jpg

i've always heard it's better to keep the tires matched on a 4x4, and in harsh winter conditions, adding wieght in the back of a truck always helps too, say a couple 50 lb sand bags or maybe more?
hth
Rick, Ore

I see your point, also i called a goodyear dealer and the tires i got are 157.95 a tire, i paid $119 at a little garage.