When I looked at prices - Summer 07 - for Liz's Tuono the Ohlins shock was the best price, but Liz only weighs about 140+ pounds rather than our 200+. So she is fine with a standard 105N spring that comes in the box with the shock.
With yourself being a larger gentleman, then the best bet may be to email a couple of suspension specialists over your side of the pond, and get a price for a shock with a heavier duty spring fitted, if you require one.
You should email the guys at the online shop side of AF1 they are some of the most helpful lads I've come across, and can probably advise you if your weight needs a heavier spring. In theory I should be able to work it out myself given what I do for a living, but designing suspension for a motorcycle is a wee bit different to bridges for highways etc.
They do the RSVR/Tuono factory shock for about $600 plus shipping ISTR - which was about £400 with import duty etc. by the time it got to the UK.
You should look at Penske - they are highly regarded on the forums and should be cheaper on your side of the pond, when I looked the shipping killed it off.