A question about springs...

[amyroukai]

Hello to all and greetings from Athens, Greece.
Bought a gen 1 in November, late 2001 model. I have been reading about it here since, trying to get to know the bike and you have been a great source of information and ideas.

So far I had to change the tyres, brake pads, chain and sprocket, all due to natural wear. But the suspension is killing me. It spoils all the fun. Plus, it's impossible to carry a +1 because it bottoms out all the time. Tried to buy new springs from the local market, but the fazer was never a poplular bike here and no local garage has been able to help me. Tried White Power, Ohlins and Hyperpro reps wth no luck. Perhaps they don't care to order two more pieces, together with their regular orders... So I followed your footsteps and emailed a couple of people you have had good experiences with, but no reply... So I will post my question here, opinions are welcome.
I was looking at the old racetech spring rate calculator, now the new one as well. The old calculator gave 1.092kg front and 9.57kg rear. The new one, 1.077kg front and 9.16kg rear for the same weights.

So, according to them, I should get the 1.0kg front in any case.
According to the old calculator I should buy the 96kn/9.8kg
According to the new calculator I should buy the 92kn/9.4kg

I am going for the higher rate and not rounding it up to the lower rate because I usually have the top case on the bike, loaded with stuff and that's something the calculator's not accounting for. I also do a lot of two up plus luggage, so a little firmer is more welcome than a little softer. And that's why I thought, get the 96kn/9.8kg spring.
But I was recently talking about it with a friend who said don't go overboard with the spring, otherwise your rear suspension will not work, it will not compress enough. But here's two options from the same source and they are both "correct". And it got me confused. How big a difference will it make, choosing the harder spring over the softer one? Is there really a risk of having a suspension that will not compress enough when riding solo or when I take the old girl to the track? The difference in numbers seems small... But then again I'm a civil engineer, not a suspension technician. Any thoughts on the matter?