Thank you for the link !
I finally placed my order on Batterfly and received the shipment less than one week after !
I just had hard times to get the FX888 in Silver (was available when I put it in my basket but unavailable when I finalized my order. I dealt with them to delay the expedition of this product but to get all the others right now, according to them the silver fx888 won't be in stock before many weeks)
Very efficient and professional team !Concerning the products themselves, apart the Hakko FR300 and FX888D I ordered these :
HAKKO N50-06 Nozzle - Size ? 1.6 mm for HAKKO FR-300 N50-06
HAKKO N50-01 S-Nozzle - Size ? 0.8 mm for HAKKO FR-300 N50-01
HAKKO N50-05 Nozzle - Size ? 1.3 mm for HAKKO FR-300 N50-05
HAKKO N50-03 Nozzle - Size ? 0.8 mm for HAKKO FR-300 N50-03
HAKKO T18-C1 Shape-1C punta saldante per HAKKO FX-888D T18-C1
HAKKO T18-C2 Shape-2C punta saldante per HAKKO FX-888D T18-C2
HAKKO T18-C4 Shape-4C punta saldante per HAKKO FX-888D T18-C4
HAKKO T18-D08 Shape-0.8D punta saldante per HAKKO FX-888D T18-D08
HAKKO T18-D12 Shape-1.2D punta saldante per HAKKO FX-888D T18-D12
HAKKO T18-D24 Shape-2.4D punta saldante per HAKKO FX-888D T18-D24
HAKKO T18-I Shape-I punta saldante per HAKKO FX-888D T18-I
HAKKO T18-S3 Shape-S3 punta saldante per HAKKO FX-888D T18-S3
HAKKO T18-K Shape-K punta saldante per HAKKO FX-888D T18-K
All of these cost a lot (approx 80€ for all tips), but I won't lack anything

I have also ordered various other items, including the Pro'sKit SS-969B hot air station.
So far I've just tested the FR300. Works great for simple PCB, but not really efficient for multilayered boards like computer's motherboards unfortunately. I guess I also need a bit of practice.
I was disappointed to see a broken piece of plastic on the FR300 just after unpacking it. It's a very little and useless one, close to the heat gun, but on something at this price it's not really pleasant !
Again, thank you all for your advices and especially to nanofrog
