HI-JACK WARNING!!!!

I've been smitten by the 6.5mm cartridges for a while
now and when/if the time comes I can add to the safe
the 6.5x55 and the 260rem will be front runners.
Could those with hands on experience help with some
distinctions, as in pros vs cons? These are some I've
been led to believe:
6.5x55-
pro's; beenchambered alot longer in many rifles
For hand loaders can be made somewhat "hotter"

con's; factory ammo on the "light" side due to old rifles in use


260rem-
pro's; factory ammo loaded closer to max pressures (?)
hand loaders can use other 308 based cases for reload

con's; not chambered in many rifles
factory ammo not widely available/expensive.

No doubt my limited knowledge shows thru here.
So the question is, which would be the best bet
for a non-reloading factory rifle type like myself?

Thanks and sorry again for the hi-jack.
Ignore me if you need to

PK