G'Day Stu,
if your really keen in LR shooting, I'd look seriously at a new action such as the Barnard, as it comes with a trigger, and you can swap barrels in or out as you see fit as well as stocks since they use a V block (or a recoil stud or lug set up)
Swapping barrels it dead simple as well as swapping the stocks for different shooting styles such as F Open, FB, BR/Fly etc.
Also the lock time is much better than a PH, this is good for accuracy, also they are heat treated then ground true and square unlike some custom actions available today. Check out the links below
http://www.barnard.co.nz/
http://www.vra.asn.au/shop/rifle.shtml
the VRA shop in Bendigo sells the actions for $1800 which is a great price, especially as you dont need a trigger, or action trued.
And if you find you dont like the LR sport, the rifle can easily be sold on whereas your PH may not be as easy to sell later.......
hope this helps
Cheerio Ned